Range Report .260 Primer Test

[Grand]

I am finishing my .260 load development. Surgeon 591, 26" Krieger chambered by Terry Cross and assembled by Randy at R&D. My load is:

R-P Brass
139g Scenar seated 2.805 OAL
H4350 Powder

I ran CCI BR2's thru my load work-up, but wanted to see if there was a measurable difference between Fed 210m primers. ES and SD's were nearly identical. No discerable difference in accuracy. 210M's gave me 11-13 fps more velocity at 4000 feet asl.


Loads:

42.8g 210M Avg. 2903 fps
42.8g BR2 Avg. 2892

43.5g 210M Avg. 2924
43.5g BR2 Avg. 2911

 

[skinney_7]

Re: .260 Primer Test

looks like my FGM210's are working just fine then!!!

 

[Mohawk3a]

Re: .260 Primer Test

velocity seems high??

 

[Grand]

Re: .260 Primer Test

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mohawk3A</div><div class="ubbcode-body">velocity seems high?? </div></div>

I agree. Rifle was shooting 2850 fps during break-in at 70-80 degrees. Now its shooting 2900 fps at 85-90 degrees. RL 17 had the 139's flying at nearly 3000 fps.

 

[goober]

Re: .260 Primer Test

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Grand</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mohawk3A</div><div class="ubbcode-body">velocity seems high?? </div></div>

I agree. Rifle was shooting 2850 fps during break-in at 70-80 degrees. Now its shooting 2900 fps at 85-90 degrees. RL 17 had the 139's flying at nearly 3000 fps. </div></div>

Im using ADI2209 43.5 grains with cci lr primers and am getting 2850fps at sea level 70f with 130 norma .

 

[RayDog]

Re: .260 Primer Test

I run 42.0 of RL17 and get 2950 with the 139s. It's awesome.

The tube before this one was 44.0 Of RL17 at 2995 It lasted about 2400 rounds.

 

[Lowe Left]

Re: .260 Primer Test

It truly amazes me how velocities differ in barrels. I run 43.4g H4350, BR2, 139scenar, win 7-08 brass + 24" benchmark 3-groove = 2825fps.

85 degrees 1400 ASL.

 

[Grand]

Re: .260 Primer Test

Ray Dog: Glad to hear you got 2400 rounds. I tested RL 17 as well running 139g Sceanars at about 3000 fps with good accuracy.

 

[sobrbiker883]

Re: .260 Primer Test

I like WLR's, I can tell my brass from others easier.

I dicked around with different primers and I'm comfortable enough with my limitations to tell you I can't shoot the difference. I think consistent brass handling is the key once you find a load your barrel likes.

 

[psinclair]

Re: .260 Primer Test

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mohawk3A</div><div class="ubbcode-body">velocity seems high?? </div></div>

I get 2850fps with 42.0grs H4350(139 scenar) through a 26" 1-8" Schneider. 8 firings on the same lot of Norma brass....I use Wolf LR mag primers FWIW. Same velocity with Fed 210M's..