6BR improved

[URBY]

has anyone tryed slower powders 4 the 6BRBS or 6BRX?:idea:

the 6BRBS has will hold 42gr of water.

 

[JeffT]

Colby,
I am shooting H4350 in my 6BR, getting 2950 fps, and bug holes with 107 SMK, didn't see the need to go to an improved case.

 

[Forum Boss]

Jeff,

I've been wanting to use H4350 in my std case 6BR, because that powder has worked so well for me in other calibers. However, I didn't think I could get enough powder in the case to get decent velocities. What's your load and do you have to run a compressed charge? Do you have a real long throat? I shoot the Scenar 105s with an OAL of about 2.355".

Are you running moly or naked bullets.

If H4350 really works, that's great news!

 

[JeffT]

Moderator,
I shoot 34.5 grains, CCI 450 primer, in Lapua case. I use a Forster funnel with the drop tube. The powder level is right at the neck/shoulder junction, this is also where a 107 SMK seated to jump .030" is seated. The load is not compressed, but right at it. I started load work up at 32 grains, and the more powder I added the better it shot, shoots 1 raggedy hole with single digit E.S..

 

[Forum Boss]

I shoot 34.5 grains, CCI 450 primer, in Lapua case. I use a Forster funnel with the drop tube. The powder level is right at the neck/shoulder junction, this is also where a 107 SMK seated to jump .030" is seated. The load is not compressed, but right at it. I started load work up at 32 grains, and the more powder I added the better it shot, shoots 1 raggedy hole with single digit E.S..

Verrrrry Interesting. "The more powder I added the better it shot--single digit ES"--that is exactly how I described my experience with H4350 in a .260. I'm fascinated that you can get that kind of accuracy jumping as far as you are. Maybe that gives the bullet time to center in the bore--who knows. Just proves there are many ways to skin a cat. I've gone as far out as .015" jump but after that I was getting pressure spikes because I was pushing the base of the bullet into the powder column. You must have a very long throat. Still this is really a pretty remarkable report.

 

[JeffT]

Moderator,
I normally don't "jump" that far either, but thats were it wanted to shoot, the bullets are bare.

 

[URBY]

Colby,
I am shooting H4350 in my 6BR, getting 2950 fps, and bug holes with 107 SMK, didn't see the need to go to an improved case.

how much 4350?

never mind i see!!

 

[Changeling]

I keep hearing the term "Bugholes", is there a relation of this in linear terms, 1's, 2's what?
Changeling

 

[Forum Boss]

I keep hearing the term "Bugholes", is there a relation of this in linear terms, 1's, 2's what?

Well I guess we do need to define our terminology. Here are two 3-shot groups. The top is about .215", not a "bughole" in my mind.

The bottom is .385" edge to edge, so about a .150-160" group, depending how you size the bullet hole. That's a bughole in my view, but YMMV.

 

[URBY]

need to use card stock paper. easy to measure!!!

 

[Changeling]

Moderator, the reason I asked is that every ones opinion is different. I see exactly what you are saying and that is what I assumed. But, Accuracy is not an assumption, "bug hole" statements belong on/in a, actually nowhere, sorry, that is just the way I feel. When you are trying to attain accuracy that kind of statement means absolutely nothing! Just my opinion.
Changeling