257 Roberts loads - The HuntingPA.com Outdoor Community
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post #1 of 18 (permalink) Old 12-31-2017, 02:13 PM Thread Starter
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257 Roberts loads

Any of you guys care to share any favorite Roberts loads? I'll be hunting deer with it, and would like to keep the bullet weight around 100-110 grains. In my stash I have Speer 87gr hotcores, 90gr hornady gmx, 100gr nosler partitions and nosler ballistic tips, 110gr nosler accubonds, 115gr nosler ballistic tips and Berger vlds.

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post #2 of 18 (permalink) Old 12-31-2017, 02:25 PM
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I'll be working on my Bob this coming spring.

I've killed deer with it with 117gr SST's (never again...long story), 110 AccuBonds (very good performers), and my daughter killed one with a 100gr Partition with it (also a very good performer).

I'll be working up a load for the 100gr PT and maybe also one for the 110AB and deciding from there what I want to do.
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post #3 of 18 (permalink) Old 12-31-2017, 03:28 PM Thread Starter
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It should be fun to compare notes, and see what each gun likes! Those are my top 2 bullet choices as well, with the 90gr gmx running a close second (if I can get it running fast enough with good accuracy)

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post #4 of 18 (permalink) Old 12-31-2017, 03:35 PM
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Ruger M77
Fed 210 primers
41.0 gr 4350
Sierra 100gr HPBT
seat your bullet about .002 off the lands
gives 1" groups at 200yds.
Killed about 12 deer at 350yds.
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post #5 of 18 (permalink) Old 12-31-2017, 04:07 PM
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I have played with and owned several quarter bores regular and wildcats. For the vel. of a Roberts unless you have a fast twist custom barrel I would stick with the 87 grainers. Never had the Roberts but had a 250/3000 Ackley Imp. and was getting around 3300 that should be in line with the Roberts. I used the 87 speer and the hornady. did descent on paper and dropped many in there tracks with it. I think anything over 100 grainers you don't have the case to get the vel. to make it work.
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post #6 of 18 (permalink) Old 12-31-2017, 04:53 PM Thread Starter
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Quote:
Originally Posted by outofstater View Post
I have played with and owned several quarter bores regular and wildcats. For the vel. of a Roberts unless you have a fast twist custom barrel I would stick with the 87 grainers. Never had the Roberts but had a 250/3000 Ackley Imp. and was getting around 3300 that should be in line with the Roberts. I used the 87 speer and the hornady. did descent on paper and dropped many in there tracks with it. I think anything over 100 grainers you don't have the case to get the vel. to make it work.
Seriously? That's the first time I've ever heard anyone say the Roberts doesn't have enough velocity for anything over 100gr. Depending on what load data you consult, you can potentially get 120gr bullets moving along at 2900fps or so. 110gr accubonds at 3000fps is nothing to sneeze at. I'd rather be running that than a light 87gr at high velocity for deer. I tetesting take on it I guess.

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post #7 of 18 (permalink) Old 12-31-2017, 05:21 PM
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Watch magizine box?

Ruger M77
CCI 200primer
41.0 gr 4350
Speer 120gr BT (target load)
Nosler 120gr Partition (hunting)
Both seated 1/16" from lands
Slower twist barrels usually don't handle the longer 120 bullet, keyhole issues. To find out your barrel twist rate place cleaning patches tight enough to spin the cleaning rod. Mark a spot on the rod and push until it rotates one revolution, mark again, diff is your twist rate.

Loaded once for a buddy with a short magazine box (REM Mountain rifle) and the longer bullet would not feed in his rifle, so watch this.
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post #8 of 18 (permalink) Old 12-31-2017, 05:22 PM
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I have gotten 100gr PT's to 3100fps with reasonable accuracy (around 1-1.5" at 100) but was getting a little too warm. That's from a 22" barrel on my M70 FWT.

I was running the 110AB slow in search of a low recoil load for my daughter. I think I had it out the muzzle around 2600. That shot very well.

I'll be doing a flatspot run on it with both bullets next spring. I used IMR4350 with the 100PT's, RL22 for the AB's, and I had a reduced recoil load with H4895 with the 100gr PT's as well.

I too am not going deer hunting with it with an 87gr bullet. It can shoot 100's and 110's. I'll stick to those.
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post #9 of 18 (permalink) Old 01-06-2018, 08:42 PM
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Quote:
Originally Posted by Borden811 View Post
Seriously? That's the first time I've ever heard anyone say the Roberts doesn't have enough velocity for anything over 100gr. Depending on what load data you consult, you can potentially get 120gr bullets moving along at 2900fps or so. 110gr accubonds at 3000fps is nothing to sneeze at. I'd rather be running that than a light 87gr at high velocity for deer. I tetesting take on it I guess.

I was just saying for my experience and I have put a lot of 25 calibers bullets in to a back stop. I'm not at all knocking the Roberts but I have never seen the need for over a 100 grainer out of a 25. I have had 2 whby's and even stopped at 100 grainers. My favorite was the 100 grain nosler solid base but they discontinued it. I then settled in on the 100 grain sierra bt. I just was concerned that the twist in factory rifles how they would handle anything over the 100 grains. Now I haven't played with them to much lately just do to many rifle projects tinkering with. My main go to 25 now is a 25/284 from Ultra Lite Arms I do use a 100 grain sierra fb since it don't like boat tails. Please trust me on this the 87 grainers and yes I like high vel. has dropped every thing me and my 25 cal. buddies have shot at in Md. and Pa. woods. Is it a lr bullet ? No its not, out to 250-300 very deadly. I might be wrong but isn't the Roberts mainly in a long action? If so thinking it lost popularity to the 25-06. Nothing wrong with it though but if it was on a short action I would think you would have magazine issues with a 115 or 120.
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post #10 of 18 (permalink) Old 01-06-2018, 09:06 PM
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It is based on the 7x57 Mauser round, and as such, won't run in a short (308-length) action.

I've shot 100gr Partitions, 110gr Accubonds, and 117gr SST's with good accuracy in my M70 Fwt.
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