257 Bob and partitions

ktscontender · 09-26-2004, 08:41 PM

Anybody with a Bob try these Nosler 120gr Partitions? I have a Win. 70 F.W. I wanted to use these bullets on deer and loaded up a couple diffrent recipes with the results being a group in the 12 to 15" size.
Finally settled on a load using Sierra 120s that turn in a group of 1/4" at 100 and a inch at 200
Several of the old boys I talked with at the range said thier Bobs never shot the partitions worth a hoot either.

Interested in hearing your results if any

johnch · 09-27-2004, 06:24 PM

Sorry , WHAT IS a Bob ?????????????????????????????????????????????????? ??????????????

charlie brown · 09-27-2004, 06:41 PM

He is referring to the .257 Roberts. I actually plan to get one built here pretty soon, any info on good deer/antelope loads would be great!!!

Did I read right that you are getting 12" groups at 200yds?!!!???!!!

DM · 09-27-2004, 06:48 PM

Quote:

He is referring to the .257 Roberts.

Then why didn't he say so in the first place???????? [:@]

Drilling Man

Vapodog · 09-27-2004, 08:14 PM

Strange.....the "Bob" is nothing more than a brass cartridge of certain dimensions.....and possibly there's a 1-12 twist but I've never had any problems with my 1-10 twist M-70 Bob and Particians.....Try the 100 grainers and see if there is an improvement.....also check the twist rate.....if it's 1-10 or faster it should handle the 120 grainers quite well.

ktscontender · 09-27-2004, 09:49 PM

Ya thats what was getting me, the sierra 120s are perfect as well as the 117 hornadys tho there is a story behind the hornadys.
I also loaded some nosler 100 gr ballistic tips and 100gr hornadys with good results it was just the 120 partitions that gave me fits.
And the 12" groups were at 100 yds!!! (yikes!) No biggie tho I can live without the Partitions as long as they keep making the 120 Sierras.
I just thought it very strange.

Deer season starts next Saturday so I'm going with the Sierras. I'll play with it some more when I'm done hunting.

The 'Bob' is one fun caliber to shoot, don't know why I didn't get one sooner.

Steven Ashe · 09-28-2004, 03:47 AM

You may want to slug the bore and see if same is oversized.

johnch · 09-28-2004, 05:06 PM

I have a 257 AI that shoots just about everything .This year I am using 115 Tripple Shock Barns . I had good groups with the Nosler 120 gr par. Got the Barns at cost so had to try.

Deleted User · 09-28-2004, 09:01 PM

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James B · 09-29-2004, 12:39 PM

I have a 700 Remington Synthetic ADL in 257 Roberts. When I bought it I bought a box of Federal factory load 120 grain Nosler Partitions I have an index card in front of me on my computer desk. On it is the first three shot group I fired with it and the Partitions. Four thenths of an inch. It did not shoot the 100 grain Ballistic tips nearly as well. It shoots the 100 grain Hornady SP very well and at 3050 FPS. I am using IMR 4350. with a Magnum Primer.