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Joined: Feb 2011
Posts: 557
Campfire Regular
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OP
Campfire Regular
Joined: Feb 2011
Posts: 557 |
Just purchased a 257 Roberts and looking for a starting load work up, any one have any ideas???
Blessed To be an American
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Joined: Feb 2010
Posts: 17,853 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,853 Likes: 2 |
I am currently developing a load for my .257 Roberts using 100 grain Noslers and IMR 4064. So far accuracy is promising. While I am on the topic, please give the grand old cartridge and its developer the late Maj. Ned Roberts the respect it has earned. It is the .257 Roberts, NOT "the Bob".
Last edited by gunswizard; 09/09/15.
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Joined: Feb 2002
Posts: 32,044
Campfire 'Bwana
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Campfire 'Bwana
Joined: Feb 2002
Posts: 32,044 |
The two best powders I have used in the 257 R is IMR 4831 and IMR 4350
A Doe walks out of the woods today and says, that is the last time I'm going to do that for Two Bucks.
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Joined: Jun 2004
Posts: 44,887 Likes: 11
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,887 Likes: 11 |
Just purchased a 257 Roberts and looking for a starting load work up, any one have any ideas??? If it's a rifle suitable for modern pressure, then one source outside of standard 257 data is 6mm Rem. data for the same weight/style of bullet.
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Joined: Nov 2010
Posts: 37,211 Likes: 9
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,211 Likes: 9 |
H100V gave me best velocity and top accuracy.
Not the best for temp stability but one to try, working up a .257R load.
DF
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Joined: Nov 2010
Posts: 37,211 Likes: 9
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,211 Likes: 9 |
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Joined: Feb 2011
Posts: 557
Campfire Regular
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OP
Campfire Regular
Joined: Feb 2011
Posts: 557 |
Great info Dirtfarmer... Thanks
Blessed To be an American
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Joined: Nov 2010
Posts: 37,211 Likes: 9
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,211 Likes: 9 |
Glad you liked it.
I get a lot more than I give here on the Fire.
DF
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Joined: May 2011
Posts: 15,928 Likes: 1
Campfire Ranger
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Campfire Ranger
Joined: May 2011
Posts: 15,928 Likes: 1 |
Glad you liked it.
I get a lot more than I give here on the Fire.
DF You give a lot here.
There are 2 rules to success:
1. Never tell everything that you know.
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Joined: Jul 2011
Posts: 162
Campfire Member
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Campfire Member
Joined: Jul 2011
Posts: 162 |
H100V gave me best velocity and top accuracy.
Not the best for temp stability but one to try, working up a .257R load.
DF Hodgdons H100V meters well (use a custom set of Lee type dippers) and I use a fair amount of it in various cartridges. Chuckle, have even done respectfully with it in .308 Win and you will not find any published load data for it....fellow range member ran Sierra's quick load for me as an experiment. Its one of my favorite powders for the 7x57, the 257 Roberts big brother. Does well for me in my 257R rifles too.
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Joined: Jul 2011
Posts: 1,792
Campfire Regular
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Campfire Regular
Joined: Jul 2011
Posts: 1,792 |
RL22, Norma MRP, RL17 and Hornady Superformance all gave much higher Velocities and equal or better Accuracy. I mostly use Nosler 115gr Partitions and 110 Nosler Accubonds.
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Joined: Dec 2002
Posts: 32,235 Likes: 1
Campfire 'Bwana
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Campfire 'Bwana
Joined: Dec 2002
Posts: 32,235 Likes: 1 |
H4895; 41 grains with 100 grain BTs and Partitions or 38 grains with 110 grain ABs.
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Joined: Jul 2011
Posts: 1,792
Campfire Regular
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Campfire Regular
Joined: Jul 2011
Posts: 1,792 |
For light bullets 100grs or less IMR4064 works real good. Most people usually start with IMR4350 or H4350, for heavier Bullets. RL22 and Norma MRP gave substantially more speed with 110gr and heavier bullets.
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Joined: Mar 2011
Posts: 1,863
Campfire Regular
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Campfire Regular
Joined: Mar 2011
Posts: 1,863 |
RL 19. I've used either the 117 hornady spbt, or the 115 ballistic tip with RL 19 for years and have no reason to switch.
H100V was inconsistent for me. Had some great groups, and then upon testing the same load couldn't duplicate the groups. Oh well.
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Joined: May 2005
Posts: 62
Campfire Greenhorn
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Campfire Greenhorn
Joined: May 2005
Posts: 62 |
I found a Ken Waters Pet Load that works well for me. 43.0 gr H4831SC over a CCI250 Magnum Primer and a Sierra 117 gr Game King BT or a Speer 120 gr Spitzer SP. I get approx 2750 to 2800 fps from a 24 inch ER Shaw barreled Rem 700 SA Both loaded to OAL 2.8 in. I have shot 5 round groups under an inch when I'm doing my part, which is getting harder to do these days.
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Joined: Nov 2010
Posts: 37,211 Likes: 9
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,211 Likes: 9 |
I just got 200 blem 115 gr. NBT's from SPS, arrived today. I already loaded a batch with 44 gr. H-4350, which in my Brux/ LA 700, shoots sub inch. One three shot group was .36", with .04 jump and 2.9" COAL. Don't try that in a SA gun with 2.8" box mag.
This load is a real killer.
DF
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Joined: May 2004
Posts: 56,194 Likes: 18
Campfire Kahuna
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Campfire Kahuna
Joined: May 2004
Posts: 56,194 Likes: 18 |
Every load book ever made has Bob loads, nothing magical about the cartridge. The load below came from a book dedicated to those with double vision. Don't recall the bullet specifically, but it's one of those 87 grain pieces of odd.
I am..........disturbed.
Concerning the difference between man and the jackass: some observers hold that there isn't any. But this wrongs the jackass. -Twain
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