6BRA 105 grain Bullets with H-4350,IMR-4350

[varget204]

Anyone using H-4350 or ,IMR -4350 in 6BRA with 105 Grain Bullets, Possible Starting Loads ?

 

[dat]

Anyone using H-4350 or ,IMR -4350 in 6BRA with 105 Grain Bullets, Possible Starting Loads ?

Not 105s, but did try it with 110SMK awhile back. 33.7 area was good for pressure, bolt lift started at 34+ Good luck

 

[xswanted]

I ran both in a Dasher.

H4350 working load for my rifle was 36.0 grains. 107s ran right around 3000fps.

IMR4350 did the same thing with a tad less powder but it’s bulkier.

I wouldn’t shoot a BR match with the load but for PRS style shooting accuracy was more than sufficient.

 

[NC/Br Shooter]

I had a barrel last year 7.5 tw 6bra that had a crazy consistent accuracy node 30.5 of Imr 4350 shooting 108s. Was only 2690 at muzzle but it didn't have any flyer's much. Shot lots of half inch groups at 300

 

[varget204]

Tried 32.5 H-4350 @ 2817 fps & 33.0 H-4350 @ 2839 fps both w/ 105 Match Burners out of 30" heavy Palma barrel ,Going to try 34,34.5 grains

 

[6BRA]

Tried 32.5 H-4350 @ 2817 fps & 33.0 H-4350 @ 2839 fps both w/ 105 Match Burners out of 30" heavy Palma barrel ,Going to try 34,34.5 grains

what are the results at 34 and 34.5? 2950?

 

[varget204]

what are the results at 34 and 34.5? 2950?

Have not had a chance to try them yet

 

[6BRA]

Have not had a chance to try them yet

I am curious, what drop tube or method are you using. At 34 gr H4350 you are very compressed with a 105...what drop tube? Vibration device? What freebore you running? Coal approx?

 

[Rat Rifle]

I am curious, what drop tube or method are you using. At 34 gr H4350 you are very compressed with a 105...what drop tube? Vibration device? What freebore you running? Coal approx?

Yesterday I did a pressure test on My 6mmBR. I trickled 34.14 grains of H4350 slowly down a metal funnel, no drop tube. Powder came to the bottom of the neck. Loaded a 105grn Hyb with no compression. Fired the round and saw no pressure signs.

I believe that plastic funnels and drop tubes slow the fall of powder kernels. I believe if drop tubes are used, they should be metal or glass.

34 plus grains of H4350 in a 6mmBRA should be no problem at all. I will test this later.

JUST RELAYING MY EXPERIENCE…NOT MAKING ANY SUGGESTIONS

 

[6BRA]

Yesterday I did a pressure test on My 6mmBR. I trickled 34.14 grains of H4350 slowly down a metal funnel, no drop tube. Powder came to the bottom of the neck. Loaded a 105grn Hyb with no compression. Fired the round and saw no pressure signs.

I believe that plastic funnels and drop tubes slow the fall of powder kernels. I believe if drop tubes are used, they should be metal or glass.

34 plus grains of H4350 in a 6mmBRA should be no problem at all. I will test this later.

JUST RELAYING MY EXPERIENCE…NOT MAKING ANY SUGGESTIONS

Lapua Brass?

 

[Rat Rifle]

Lapua Brass?

Yes…always leave something out

 

[6BRA]

I just got 34.5 in a bra..bottom of neck..Lapua. best I could do.

 

[Rat Rifle]

I just got 34.5 in a bra..bottom of neck..Lapua. best I could do.

Your going too fast.

edit: I just did a 6mmBRA, Lapua Brass, H4350. Got 35.12 to the bottom of the neck. Used an aluminum funnel. Took about a minute.

 

[varget204]

I am curious, what drop tube or method are you using. At 34 gr H4350 you are very compressed with a 105...what drop tube? Vibration device? What freebore you running? Coal approx?

Have Never used a Drop Tube, I use a $5 electric tooth brush from $General to vibrate cases,only takes a few seconds. using Peterson Brass, Coal approx 2.380

 

[jhunter]

34.2 H4350 gave me 2976fps with Lapua brass out of a 29”. .025” of erosion after 700 rounds

 

[Rat Rifle]

OK, we’re hearing about the velocity, but what kind of scores and groups are these powders producing ??

 

[varget204]

Loaded 34.5 H4350 w/ electric tooth brush powder was at base of neck, 35.0 grs was 1/8"+ below neck,it would be compressed load @35 grs

 

[Rat Rifle]

None of this matters unless someone is putting 5 rounds in the 10 ring at 600 yards using these powders. Otherwise, there are other powders available that can. This is the “Accurate Shooter“ site.

 

[highdrum]

33.7gr H4350 in alpha 6bra brass, 105s seated 40k jump running 2950 from a 28" 7.5tw 237 bore barrel, have shot a few handful of 5 shot groups at 300y in the 1s and 2s. I'm just a prs shooter tho, and this load works very well for that.

 

[varget204]

Shot 33.5,34.0.34.5 grains of H-4350 yesterday, w/105 Match Burner out of 31 " Heavy Palma 6BRA, wind was 20-27 mpg out of SW, 33.5 -2902 fps,34.0-2927 fps,34.5-2971 fps, Group was .342,#1 @6:00,#2 @12;oo@3 between 1 & 2