Home Forums Hunting & Shooting Ask The Gunwriters SO ABOUT THE 257 ROBERTS...

I don't do "factory"

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.

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.

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?

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

Since when has "need" influenced a rifle loony?

47gr Re19 and 100gr Sierra works fine in mine. Around 2900

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.

First time I've seen this OP and thread. Beautiful classic rifle and a great cartridge. Congrats.

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.

The Roberts and the .250 are unavoidable for me. Probably why I have three of each.

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

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.

Hi, see my post above, but I suspect the 20" barrel has something to do with the low MV as well.

That load is a winner! BUT, I hope you have a good supply of 100 gr Hornadys, ‘cause they quit makin’ ‘em

I do! bought ten boxes before they went off the market

I'm sure there's enough jingle in your pocket for Partitions if you want to go that way later.

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 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.