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Campfire 'Bwana
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OP
Campfire 'Bwana
Joined: Jun 2003
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Just got back from the range. Pleased with the results accuracy-wise, but the loads in both the Nosler and Hornday book were disappointing velocity-wise (barrel length 20" which is an obvious velocity issue): Factory hornady 117gr SST : 2857,48,52; .69"100gr Hornady SP 44gr IMR-4350 .95" 2675, 73, 74 .78" 117gr Hornady RN 41gr H-4350 2567,73,72 .75" 117gr Hornady SP 41gr H-4350 2592,94,92 .63" All three shot groups Begs the question; my 24" 257 Weatherby gets 3550 with the same 100gr bullet and sub half MOA, so why bother? I think you found your load: Factory hornady 117gr SST : 2857,48,52; .69" nothin' wrong with that I don't do "factory"
A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”
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Joined: Jun 2004
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,875 Likes: 7 |
Just got back from the range. Pleased with the results accuracy-wise, but the loads in both the Nosler and Hornday book were disappointing velocity-wise (barrel length 20" which is an obvious velocity issue): Factory hornady 117gr SST : 2857,48,52; .69" 100gr Hornady SP 44gr IMR-4350 .95" 2675, 73, 74 .78"117gr Hornady RN 41gr H-4350 2567,73,72 .75" 117gr Hornady SP 41gr H-4350 2592,94,92 .63" All three shot groups Begs the question; my 24" 257 Weatherby gets 3550 with the same 100gr bullet and sub half MOA, so why bother? Re the one I highlighted: Look at Hodgdon's online data for the 6mm Remington using 100 grain bullets with H4350, IMR4350 and IMR4451. Top speeds there are in excess of 3100 fps from a 24' test barrel. Let's deduct 50 fps/inch for 4" to subtract 200 fps and say 2900 fps top end. Since the Roberts is the same case with a larger neck it should safely digest more of the same powder with the same weight bullet. I don't know how the rifle you have reacts to "modern" pressures so a careful workup would be in order, but it sure seems like you could work this one up a good bit.
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Joined: Feb 2004
Posts: 17,136 Likes: 4
Campfire Ranger
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Campfire Ranger
Joined: Feb 2004
Posts: 17,136 Likes: 4 |
Just got back from the range. Pleased with the results accuracy-wise, but the loads in both the Nosler and Hornday book were disappointing velocity-wise (barrel length 20" which is an obvious velocity issue): Factory hornady 117gr SST : 2857,48,52; .69" 100gr Hornady SP 44gr IMR-4350 .95" 2675, 73, 74 .78" 117gr Hornady RN 41gr H-4350 2567,73,72 .75" 117gr Hornady SP 41gr H-4350 2592,94,92 .63" All three shot groups Begs the question; my 24" 257 Weatherby gets 3550 with the same 100gr bullet and sub half MOA, so why bother? The rifle — that’s why bother! 😊. Very nice find. Buttery smooth, classic quality. I would think that this carbine in “The Bob” would have much more hunting utility in your corner of the country than the Wby cartridge. And I would use it.
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Joined: Jun 2012
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Campfire Tracker
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Campfire Tracker
Joined: Jun 2012
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I've been looking at those Kimber Hunters in the 257 Roberts for awhile now....Thinking about pulling the trigger on one. I owned a 6mm for a few years and always regretted selling it.
But I have a 243, two 708s, 270, a 257weatherby mag for deer guns. Do I really need another?
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Joined: Jun 2003
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Campfire 'Bwana
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OP
Campfire 'Bwana
Joined: Jun 2003
Posts: 42,628 Likes: 1 |
Just got back from the range. Pleased with the results accuracy-wise, but the loads in both the Nosler and Hornday book were disappointing velocity-wise (barrel length 20" which is an obvious velocity issue): Factory hornady 117gr SST : 2857,48,52; .69" 100gr Hornady SP 44gr IMR-4350 .95" 2675, 73, 74 .78"117gr Hornady RN 41gr H-4350 2567,73,72 .75" 117gr Hornady SP 41gr H-4350 2592,94,92 .63" All three shot groups Begs the question; my 24" 257 Weatherby gets 3550 with the same 100gr bullet and sub half MOA, so why bother? Re the one I highlighted: Look at Hodgdon's online data for the 6mm Remington using 100 grain bullets with H4350, IMR4350 and IMR4451. Top speeds there are in excess of 3100 fps from a 24' test barrel. Let's deduct 50 fps/inch for 4" to subtract 200 fps and say 2900 fps top end. Since the Roberts is the same case with a larger neck it should safely digest more of the same powder with the same weight bullet. I don't know how the rifle you have reacts to "modern" pressures so a careful workup would be in order, but it sure seems like you could work this one up a good bit. Great minds think alike I've made up some loads with 46gr of IMR 4350 for the 100gr as well as 43gr of H-4350 for the 117s and report back
A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”
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Joined: May 2005
Posts: 10,449
Campfire Outfitter
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Campfire Outfitter
Joined: May 2005
Posts: 10,449 |
I've been looking at those Kimber Hunters in the 257 Roberts for awhile now....Thinking about pulling the trigger on one. I owned a 6mm for a few years and always regretted selling it.
But I have a 243, two 708s, 270, a 257weatherby mag for deer guns. Do I really need another? Since when has "need" influenced a rifle loony?
"Civilized men are more discourteous than savages because they know they can be impolite without having their skulls split, as a general thing." Robert E. Howard
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Joined: Jun 2015
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Campfire Regular
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Campfire Regular
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47gr Re19 and 100gr Sierra works fine in mine. Around 2900
Society of Intolerant Old Men. Rifle Slut Division
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Joined: Jan 2009
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Campfire Regular
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Campfire Regular
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Funny thing happened the other day. I had three .257 Roberts rifles and thought three is a bit too many so rebarrelled one to 7x64. Then last weekend I got on the Used Guns website and there is a Ruger Ultralight in "Perfect" condition. In .257 Roberts of course. The dealer is selling it for a mate and thinks there's a very good chance his mate has never even fired it. I ummed and aahed for a couple of hours but I knew it was pointless so now I am back on three Roberts's again. I always wanted an Ultralight in .257R despite already having one in .250 Savage.......and another in .308. The Roberts is one of those very few cartridges that has that power over me.
Last edited by Elvis; 03/08/18.
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Joined: Jun 2004
Posts: 44,875 Likes: 7
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,875 Likes: 7 |
Funny thing happened the other day. I had three .257 Roberts rifles and thought three is a bit too many so rebarrelled one to 7x64. Then last weekend I got on the Used Guns website and there is a Ruger Ultralight in "Perfect" condition. In .257 Roberts of course. The dealer is selling it for a mate and thinks there's a very good chance his mate has never even fired it. I ummed and aahed for a couple of hours but I knew it was pointless so now I am back on three Roberts's again. I always wanted an Ultralight in .257R despite already having one in .250 Savage.......and another in .308. The Roberts is one of those very few cartridges that has that power over me. That's a nice set.
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Joined: Sep 2008
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Campfire Ranger
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Campfire Ranger
Joined: Sep 2008
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First time I've seen this OP and thread. Beautiful classic rifle and a great cartridge. Congrats.
NRA Member - Life, Benefactor, Patron
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Campfire Regular
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Campfire Regular
Joined: Nov 2005
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Jorge,
I suspect your rifle has a fairly long throat, which would explain your lower velocities. Mathman and you have the right idea to just add some more powder until you get your velocities and pressures up where you want them.
And the accuracy you are geting from that little gun is excellent.
Nifty-250
"If you don't know where you're going, you may wind up somewhere else". Yogi Berra
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Joined: May 2005
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Campfire Outfitter
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Campfire Outfitter
Joined: May 2005
Posts: 10,449 |
Funny thing happened the other day. I had three .257 Roberts rifles and thought three is a bit too many so rebarrelled one to 7x64. Then last weekend I got on the Used Guns website and there is a Ruger Ultralight in "Perfect" condition. In .257 Roberts of course. The dealer is selling it for a mate and thinks there's a very good chance his mate has never even fired it. I ummed and aahed for a couple of hours but I knew it was pointless so now I am back on three Roberts's again. I always wanted an Ultralight in .257R despite already having one in .250 Savage.......and another in .308. The Roberts is one of those very few cartridges that has that power over me. The Roberts and the .250 are unavoidable for me. Probably why I have three of each.
"Civilized men are more discourteous than savages because they know they can be impolite without having their skulls split, as a general thing." Robert E. Howard
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Joined: Sep 2005
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Campfire Regular
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Campfire Regular
Joined: Sep 2005
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I'd look hard at the TTSX, and not much further.....
When I had my Bob, I ran the 90gr Barnes X into sub-MOA groups with IMR 4831 (as I recall, it's been a few years..). Hard not to think that the TTSX would be any less efficient at making living things expire.
Kaiser Norton
The Kaiser- "If it ain't broke, I can fix that!"
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Joined: Jun 2003
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Campfire 'Bwana
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OP
Campfire 'Bwana
Joined: Jun 2003
Posts: 42,628 Likes: 1 |
Gents, I was out shooting this weekend with Hatari up at his club in Atlanta and I've found a good load for the 100gr Hornady. 46gr IMR 4350 got me a really nice .5" triangle with no apparent pressure signs. I will chrono this week, but the brass ejected smoothly and no ejector marks or anything. Still looking for that 117gr load. Don't know why, but I'll find it eventually. I'm also going to try the 90gr TTSXs for the hell of it. The 100 grain Hornadys do just fine in my 257 Weatherby so I suspect they'll work at this MUCH lower velocity.
A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”
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Joined: Jun 2003
Posts: 42,628 Likes: 1
Campfire 'Bwana
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OP
Campfire 'Bwana
Joined: Jun 2003
Posts: 42,628 Likes: 1 |
Jorge,
I suspect your rifle has a fairly long throat, which would explain your lower velocities. Mathman and you have the right idea to just add some more powder until you get your velocities and pressures up where you want them.
And the accuracy you are geting from that little gun is excellent. Hi, see my post above, but I suspect the 20" barrel has something to do with the low MV as well.
A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”
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Joined: Apr 2003
Posts: 6,840
Campfire Tracker
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Campfire Tracker
Joined: Apr 2003
Posts: 6,840 |
Gents, I was out shooting this weekend with Hatari up at his club in Atlanta and I've found a good load for the 100gr Hornady. 46gr IMR 4350 got me a really nice .5" triangle with no apparent pressure signs. I will chrono this week, but the brass ejected smoothly and no ejector marks or anything That load is a winner! BUT, I hope you have a good supply of 100 gr Hornadys, ‘cause they quit makin’ ‘em
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Joined: Jun 2003
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Campfire 'Bwana
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OP
Campfire 'Bwana
Joined: Jun 2003
Posts: 42,628 Likes: 1 |
I do! bought ten boxes before they went off the market
A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”
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Joined: Jun 2004
Posts: 44,875 Likes: 7
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,875 Likes: 7 |
I'm sure there's enough jingle in your pocket for Partitions if you want to go that way later.
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Joined: Nov 2005
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Campfire Ranger
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Campfire Ranger
Joined: Nov 2005
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Funny thing happened the other day. I had three .257 Roberts rifles and thought three is a bit too many so rebarrelled one to 7x64. Then last weekend I got on the Used Guns website and there is a Ruger Ultralight in "Perfect" condition. In .257 Roberts of course. The dealer is selling it for a mate and thinks there's a very good chance his mate has never even fired it. I ummed and aahed for a couple of hours but I knew it was pointless so now I am back on three Roberts's again. I always wanted an Ultralight in .257R despite already having one in .250 Savage.......and another in .308. The Roberts is one of those very few cartridges that has that power over me. That's a nice set. I had a Ruger .257 Ultralight for a while, long ago in a galaxy far away. It was the designated rifle for my then girlfriend. We loved the gun- awfully nice to carry all day, and accurate. My only complaint was it would group three nice and tight, then when the slim barrel started to heat up it would start to string vertically- not much, but somewhat. Could've been a bedding issue too, I suppose. I never investigated further because it was a moot point for a hunting rifle, IMO. Fortuitously it liked the same load I was shooting out of my M1952 Mannlicher-Schoenauer .257 at the time- a stiff charge of 4350 (it's been too long to remember the exact weight) and 100 grain Norma bullets. (You could actually find 100 grain Norma's on the shelf back then.) We killed a lot of stuff with those guns.
"You can lead a man to logic, but you cannot make him think." Joe Harz "Always certain, often right." Keith McCafferty
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Campfire Outfitter
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Campfire Outfitter
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"(You could actually find 100 grain Norma's on the shelf back then.) "
I still have five boxes of Norma .257 Bob ammo. Four are full and #5 has 15 rounds. They came with a Ruger #1B in the Bob. Gun still had a scope on it and the guy said it was sighted in. I took it to the range and five rounds went into a half inch. That ammo is reserved strictly for the Ruger. I'll do reloads in the M70 FWT. Paul B.
Our forefathers did not politely protest the British.They did not vote them out of office, nor did they impeach the king,march on the capitol or ask permission for their rights. ----------------They just shot them. MOLON LABE
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