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#4112837 - 05/25/10 05:15 AM Re: 257 roberts [Re: vapodog]
scottfromdallas Offline
Campfire Regular

Registered: 01/24/10
Posts: 553
Loc: Tejas
Originally Posted By: vapodog
Don't overlook the 110 grain accubond.....another fine selection for the Roberts! H-4350 works well here too!


+1....I did some bullet testing and the accubond was a terrific performer. Now I just need to try it on game. The 115 NBT also performed very well. Sierras fragmented and lost their core rather easily. Haven't tested Interlocks yet.
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#4116909 - 05/26/10 12:18 PM Re: 257 roberts [Re: n007]
CKW Offline
Campfire Regular

Registered: 05/09/10
Posts: 428
Loc: Entering dotage
n007
I've tried Hodgdon Hybrid 100V in a 257 R. Used Remington brass and primers with Hornady 100 g. flat base bullets in 0.5 g. increments from 44 to 48 grains. COL=2.94. Fired a single round through the chronograph with the following results.

44 g = 2889 fps
44.5 g = 3016
45 g = 3044
45.5 g = 3093
46. g = 3115
47 g = 3174
47.5 g = 3205
48 g = 3220
Shot in a custom Mauser with a 22" barrel (don't know make). This rifle averages about 100 fps faster than my other 257 and the Mauser will have a stiff bolt with some factory loads or other commonly suggested reloads with H4350 and H414. I experienced no stiffness to bolt opening in the above sequence. Later I used the 47.5 g. load to take two doe antelope so I have shot the rifle a number of times with that load to sight in, etc.

I also ran a series with heavier bullets trying both Hornady 117 g. BTSP, 115 g. Nosler partition and 115 g. Nosler combined technology. These were loaded from 42 to 46 g. of powder. I used CCI BR2 primers, Rem brass. With these there was a slight stiffness to the bolt at the 46 g. load. Velocity was 3003 fps with both the Hornady and Nosler Partition, the CT Nosler was shot on a much colder day and it recorded 2923 fps (these were for 45.5 g of powder). I haven't shot the heavier bullets for accuracy yet.

My results basically mirror the information on Hodgdon's web site for Hybrid 100 V in this particular rifle. The 45.5 g load is as high as I will go with the 115 g Noslers (both kinds) as the Noslers seem to develop more pressure than the Hornady 117 g. which has a shorter bearing surface from what I can tell.

Sorry for the long epistle but you asked! Clint


Edited by CKW (05/26/10 12:20 PM)
Edit Reason: clarify load data
_________________________
"It is wise, though, to remember above all else: rifle, caliber, scope, and even bullets notwithstanding, the most important feature of successful big game hunting is to put that bullet in the correct place, the first time!" John Jobson

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#4123723 - 05/28/10 08:00 PM Re: 257 roberts [Re: CKW]
n007 Offline
Campfire Ranger

Registered: 12/19/02
Posts: 2357
Loc: Victoria, BC, Canada
Clint thanks for taking the time and effort to reply to my question, very helpful information. Did you find one load significantly more accurate?

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#4125924 - 05/29/10 07:07 PM Re: 257 roberts [Re: n007]
CKW Offline
Campfire Regular

Registered: 05/09/10
Posts: 428
Loc: Entering dotage
I haven't really shot them for accuracy, I shot one 3 shot group with two into < 1/2" and the third was called out to the left about an inch at the end of the chronograph session last fall with the 48 g. load. Then went hunting and haven't done the accuracy testing yet but hope to do it this summer.

That rifle has shot most other loads into 1.25" to 1.5" pretty consistently even with my lousy bench technique so I thought I was good to go.

I was -- except for the wind! That is why I started looking at heavier bullets.
_________________________
"It is wise, though, to remember above all else: rifle, caliber, scope, and even bullets notwithstanding, the most important feature of successful big game hunting is to put that bullet in the correct place, the first time!" John Jobson

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#4127820 - 05/30/10 04:44 PM Re: 257 roberts [Re: CKW]
Papershredder Offline
New Member

Registered: 05/30/10
Posts: 2
I had great results with Hybrid 100V pushing 165 g Accubonds on my .300 WSM. I got well under 1" groups with 67.5g's and was seeing an average of 3170 fps thru the chrono.

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#4127852 - 05/30/10 05:02 PM Re: 257 roberts [Re: Papershredder]
Bruzer Offline
Campfire Ranger

Registered: 12/15/06
Posts: 1936
Loc: Georgia Woods
Another vote for the 100gr TSX.....2970 with RL19 kills whitetails and shoots .75 out of my Ruger RSI with the short barrel.

Bruz
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Bruz
"You can't scare me.........I have kids"



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#4128684 - 05/31/10 02:17 AM Re: 257 roberts [Re: CKW]
BobinNH Online   content
Campfire Oracle

Registered: 01/28/07
Posts: 28397
Clint that is a good post. Thanks for that info.

This 110V powder has my attention and I am going to try it in my Roberts.


Edited by BobinNH (05/31/10 02:20 AM)
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#4128705 - 05/31/10 03:46 AM Re: 257 roberts [Re: BobinNH]
jimone Offline
Campfire Regular

Registered: 03/05/10
Posts: 515
Loc: Maine USA
110V shoots well in my 257 Roberts, was advised by Hodgedon that it is quite temperature sensitive like all ball powders, so I will stick with single base extruded powders (H4831, H4350) for hunting loads here in Maine where I've seen temperature change 80 degrees (80 on opening day, 0 F and 2 feet of snow on closing) during deer season, or in Afrika where temperatures might top 100F.
100V goes threw measures great, I like it for practice, good for hunting if you work up your load at ambient temperature.
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"It is rather for us to be here dedicated to the great task remaining before us-..." A. Lincoln

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#4128807 - 05/31/10 05:36 AM Re: 257 roberts [Re: jimone]
BobinNH Online   content
Campfire Oracle

Registered: 01/28/07
Posts: 28397
Jim, I would have thought it was part of their Extreme line.Good point...thanks!
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Just because I'm not listening...doesn't mean I'm not paying attention.

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#4129008 - 05/31/10 07:26 AM Re: 257 roberts [Re: BobinNH]
jimone Offline
Campfire Regular

Registered: 03/05/10
Posts: 515
Loc: Maine USA
In my Mark X 42gr with 117 gr Sierra SBT, CCI 200, R-P brass, 2.775" OAL they shoot 1.25" group at 200 yds, gonna try the last 15 I have loaded at 300 yds this afternoon. Haven't chronoed them. will try to today.
Gonna try IMR 8208XBR next, and in 30-30, 308, 30-06.
_________________________
"It is rather for us to be here dedicated to the great task remaining before us-..." A. Lincoln

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