over 34.5 in a 30 br.

[Link]

How many of you guys have found a good tune over 34.5 gr H4198 in your 30BR under a 118 bullet?

 

[OmegaRed]

34.8 in two of em. Here's one workup

 

[jimmymac]

In a BR rifle, I’ve run 34.7 a good bit. Guys do more than that. The target and the gun operation will tell you what it likes. Start off low.

 

[AlNyhus]

How many of you guys have found a good tune over 34.5 gr H4198 in your 30BR under a 118 bullet?

It's there...provided you can get the powder in the case. But there's ways to accomplish that. What gets in the way is the practicality of doing that in a tournament setting when you're loading between relays. Of course, where the base of the bullet ends up in the neck matters more than a little. The 'long neck' 30BRs (1.540-ish) give a little extra volume over the 1.500-ish versions.

In the past, my solution for more 4198 in a 30BR case was the 30BRX.

Honestly, there are several powders out there that are worth exploring when we look at load density relative to charge weight. Work in that area could prove worthwhile

Good shootin' -Al

35.0+++ load density:

 

[rjtfroggy]

Al I don't know how you do it, with 31.2 I'm sitting right at the neck shoulder junction using a drop tube. I seat .005 off the lands with good accuracy, until the other day when my scope pooped. Now to start over.

 

[AlNyhus]

I have an insert in the bottom of my drop tube with a small diameter opening. This slows the powder enough so it really packs in the case nicely. It's like using a long drop tube but a lot less cumbersome.

You can also stretch out a spring and put it in the drop tube...the powder swirls around the spring and slows down before it drops into the case. -Al

 

[Mike Casselton]

You can also stretch out a spring and put it in the drop tube...the powder swirls around the spring and slows down before it drops into the case. -Al

Sneaky. I like it.

 

[Link]

Al I don't know how you do it, with 31.2 I'm sitting right at the neck shoulder junction using a drop tube. I seat .005 off the lands with good accuracy,

Is 31.2 H4198 a error? At 34.5 i'm setting 1/2 way up the neck. I have been up to 34.8 with no hard bolt lift. But the accuracy didn't get any better.



ty Guys.

 

[AlNyhus]

Is 31.2 H4198 a error? At 34.5 i'm setting 1/2 way up the neck. I have been up to 34.8 with no hard bolt lift. But the accuracy didn't get any better.

Something doesn't sound kosher. Your 34.5 half up the neck is pretty spot on. In all my 30BR stuff through the years (Lapua cases), 32.5 is right at the bottom of the neck.

4198 being on the edge of too slow in the 30BR, one big advantage of the 34.5+ loads is how the powder cleans up at higher charge weight. If you look, the inner case necks with the stiffer charges look a bit 'grayer' (dirt clod ballistic-speak) than the low end charges. -Al

 

[Bill Norris]

I've been up to 35.4 gr. of H-4198 in my 30BR without a drop tube but accuracy was no better than 34.7 gr.

 

[Link]

I am going to try 35.0 with no drop tube. This gives me .025 of crush on the powder.
Maybe tonight.

 

[rjtfroggy]

Its kosher I'm using the other Hogdon,=IMR.

 

[AlNyhus]

Its kosher I'm using the other Hogdon,=IMR.

You can't compare case fill between H4198 and IMR4198. The IMR 'sticks' are considerably longer than Hodgden H4198. -Al

 

[rjtfroggy]

I can see that from your picture.
I've also been told that the IMR version will not work in the 30br, but dang 5 in a ragged hole, using a brand new Hart barrel sure looks pretty good to me at 100 yards.
With a little over 6 lbs. of it I'll keep using until I run out then switch over to the Vivatori powder.
I'll be starting over this coming week with a 40x Leupold because the 45 went back for factory repair yesterday.

 

[Link]

I shot 35.0 of h4198 last night. No signs of pressure, the cci 400s looked good. Very little improvement over 34.5 or 34.7. But enough to stay with it.
Both were in the low .2s .

 

[AlNyhus]

I've also been told that the IMR version won't have the muzzle velocity of not work in the 30br, but dang 5 in a ragged hole, using a brand new Hart barrel sure looks pretty good to me at 100 yards.

Yes....IMR4198 can shoot very well in a 30BR. The velocity is a bit lower, is all. Sounds like it's working great for you. -Al