257 Roberts and 120 gr Partition
- Thread starter Hadsdad
- Start date
salmonchaser
Ammo Smith
- Dec 13, 2013
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I shoot my #1 257 quite a lot, she doesn't like anything over 110s. Sending her off this spring to get turned into 257 ackly improved. My mom was shooting 120s out of her 257, Remington 722. She got the rifle in the late 50s when we were in Alaska. She killed Caribou in Alaska and deer and elk in Oregon. I'm pretty sure she was running partitions by the mid 60s. The Partition is a great bullet in the old Bob and quite frankly one of the reasons I'm debarelling mine with a little faster twist.
- Nov 4, 2004
- 26,985
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I've shot the 115 gr PT from the 257 Bob and it hammers WT deer. Same with the 115 gr BT.
JD338
JD338
Blkram
Handloader
- Nov 25, 2013
- 3,431
- 4,323
I tried the factory Nosler 120 gr Partition in my first 257 Roberts, a Lipsey's Edition Ruger No.1 RSI. The 20" barrel was producing 2602 fps and 1.4" groups. It did better with the 110 gr AccuBond ammo, producing 0.736" groups at 2830 fps.
I haven't tried it as yet in my current Bob, a custom LH Sako 591 with a 22" Shilen 1:10 twist barrel. The 115 gr BT shows some issues for accuracy, so I am going to try the 115 gr Partition to see if the shorter bullet will perform better in my rifle. The 110 gr AccuBond ammo produces 0.582" groups at 2989 fps in this rifle.
I haven't tried it as yet in my current Bob, a custom LH Sako 591 with a 22" Shilen 1:10 twist barrel. The 115 gr BT shows some issues for accuracy, so I am going to try the 115 gr Partition to see if the shorter bullet will perform better in my rifle. The 110 gr AccuBond ammo produces 0.582" groups at 2989 fps in this rifle.
RL338
Handloader
- Mar 23, 2017
- 4,553
- 7,915
I did try them in my 14” barrel 25 Creed just a little slower than what you’re getting , accuracy not to my liking. I do have some loaded up in the 257 Wby to try out.
- Thread starter
- #6
Accuracy is pretty good in mine. I had a Brazilian VZ-24 rebarreled from 7x57 into 257 Bob probably 15 years ago. I had it built for my wife. She shot one animal with it and decided she didn't appreciate hunting. It is a cheap Adams and Bennett barrel from Midway. It shoots under an inch at 100 with everything 120 gr and down to 75 grain Sierras. I was just wondering about terminal performance.
I bought a whole mess of Speer Grand Slams at an estate sale a few years ago for $2 a box. I've found them to work pretty well out to about 250 yards, farther than that and they seem kind of hard and don't open very well. Which to be honest is mostly ok. I hunt and work a lot in South Texas and don't get a bunch of long shots. I'm figuring the GS's were made for the 257 Roy. I was wondering if the 120 Partitions were going to be the same? Pretty hard or if they would work any better. I got a pretty good deal on them a few years ago when Midway had a factory seconds sale on them. Yeah, I'm cheap, sue me.
Thanks for the replies so far.
- Nov 4, 2004
- 26,985
- 13,284
You shouldn't have any issues with the 120 PT opening up, even at 250-300 yards.
JD338
I agree with Jim but if I was shooting smallish deer with a 257 Roberts I’d be in on the 100 BT myself. But saying that, 2850 with that 120 PT is more than capable of opening much further than what you’re planning to shoot. Run it through a ballistics ap and see where it his 2000FPS and use that as a safety minimum range to shoot animals.
Bruce Mc
Handloader
- Oct 26, 2005
- 1,450
- 1,088
I see you had a mauser conversion, is that what you're loading for. If it is I would start with 46 grs of H 4831 sc and work up to 48-49 grs which should give you close if not more than 3000 fps from that 24" barrel. No problem with expansion.
- Thread starter
- #10
I used to use 100 gr BTs. And one of my Bobs loves them. I have found that the 100 grainers are a little light for some of the bigger hogs I come across. Plus, I got a really good deal on the Speers and the Partitions. That particular rifle is just about to get rebarreled because it is about shot out. I might make it an AI this time or I might step up to 25-06. I'm just not looking forward to getting new brass and dies and, and, and. So it will probably stay a plain ole 257 Roberts maybe with a faster twist barrel though.
- Thread starter
- #11
3,000 with a 120 would be perfect. Although 2850 still keeps me above 2,000 to about 375 yards.
Also, has anyone ever seen Partitions with a cannelure? I was wondering if they were maybe overstock or seconds for the old Federal Partition loads?
GregoryB.
Beginner
- Feb 5, 2022
- 239
- 538
I have some 115 or 120gr with the canalure. I got them as factory seconds a few years ago. They were made for an ammo maker that wanted the canalure.
- Nov 4, 2004
- 26,985
- 13,284
RL338
Handloader
- Mar 23, 2017
- 4,553
- 7,915
I these some time back from Midway as overruns.
gerry
Ammo Smith
- Mar 1, 2007
- 7,086
- 2,333
Nothing wrong with a fast twist 257 Roberts, you'll be able to shoot any bullet you want all the way up to the new heavyweights starting to come out now.
I got some of those too, they also have a different profile/ogive
- Nov 4, 2004
- 26,985
- 13,284
- Thread starter
- #18
Those are the ones that I have
