6BRA load data

[Mulligan]

N-135 is very close to H-4895, I’m shooting a few tenths less 135 vs 4895 in my dasher pushing 103-105 gr bullets.
CW

 

[tj66]

I'm using N135 with 68 Dominators with very good results.

 

[JMayo]

I crono'd varget 30.6 & found it to be 2830+-. (My pet load)

Cfe 223 at 32.2 was at 2900. I went all the way to 33.4, didn't get better on paper 100yds.

I haven't crono'd cfe less than 32.2.
Accuracy seems to be at 30.8 cfe223 on paper 100 yds

 

[Creed Bratton]

Throwing together some FF loads tonight using Varget. Have read through all 35 pages on this thread. Looks like people have fireformed with anywhere from 29-31g of Varget. Will 29 grains yield enough pressure to get a fully formed shoulder or do I need to go up in charge weight? Thanks.

 

[Bill Norris]

Throwing together some FF loads tonight using Varget. Have read through all 35 pages on this thread. Looks like people have fireformed with anywhere from 29-31g of Varget. Will 29 grains yield enough pressure to get a fully formed shoulder or do I need to go up in charge weight? Thanks.

Is this Lapua brass and what weight bullet ? 29 grains is Hodgdon max load for the 107 gr. class bullets.

 

[Creed Bratton]

Sorry. Lapua 6 BR cases with 105 VLD and 105 Barnes.

 

[Bill Norris]

Sorry. Lapua 6 BR cases with 105 VLD and 105 Barnes.

29 gr. should be O K to blow out brass with the 105 VLDs. Can't comment on the 105 Barnes. No experience with that one.

 

[Jet]

It should. Last time I used Varget to fireform the load was 29.9gr with a 400 primer and 105 Hornady BTHP jammed a wee bit. Shoulders came out fine.

 

[Mxracer532]

How in the hell are you guys getting 31+ grains? I realize most are using 105's not 108's but...........

 

[tom]

View attachment 1349737How in the hell are you guys getting 31+ grains? I realize most are using 105's not 108's but...........

Lapua brass, and most the popular 103-105s have a far shorter bearing length, besides the few extra grains of weight.

Tom

 

[Link]

30.7 H4895 108s just touching Alpha . 80* No pressure signs. I don't know why. ??
In the 31s I start to get hard bolt lift. I seem to have a node at 30.7. Rifles are like boats, they should all have womens names.

 

[titus123]

View attachment 1349737How in the hell are you guys getting 31+ grains? I realize most are using 105's not 108's but...........

I saw your post on the Facebook page earlier.... My rifle has very similar behavior with the 108 ELDM and H4895. My assumption is that it is the Alpha brass. Case capacity seems to be about .75 grains less than Lapua brass. That would explain the pressure at close to standard loads( most are based on the use of Lapua brass).

 

[Mxracer532]

30.7 H4895 108s just touching Alpha . 80* No pressure signs. I don't know why. ??
In the 30s I start to get hard bolt lift. I seem to have a node at 30.7. Rifles are like boats, they should all have womens names.

What's weird to me is 3 days earlier I shot all the way to 30.6 with only ejector swipe. No sticky bolt. Same 90° temp as yesterday.
Same seating depth ect...... my groups also went in the toilet. Guess I need to maybe start over since switching to cci450's. (My original load workup was with antique h4895 and fed205's. It was slow but it shot every charge and seating depth extremely well)

 

[Link]

30.7 H4895 108s just touching Alpha . 80* No pressure signs. I don't know why. ??
In the 30s I start to get hard bolt lift. I seem to have a node at 30.7. Rifles are like boats, they should all have womens names.

I'm sorry I made a mistake. It should be over 31grains I start to get hard bolt lift.

Could be worse though.

 

[Northridge]

That is where info on these threads can be dangerous, we have to do the “work” looks like your approach was sound by working in slow shooting g a pressure ladder and while doing so you found your pressure ceiling for your equipment and components used, this is good info to have and your rifle will tune somewhere below identified pressure ceiling. Good luck and happy tuning..

Shawn Williams

 

[Danley]

By chance, is this virgin brass &/or a new barrel?

 

[Mxracer532]

By chance, is this virgin brass &/or a new barrel?

No, twice fired brass. Approximate 400 rounds fired. (Preece chambered Proof)

 

[Eloudamy]

View attachment 1349737How in the hell are you guys getting 31+ grains? I realize most are using 105's not 108's but...........

Mine also shows pressure about the same charge as yours. I use 105 Barts with 29.8 gr H4895 with the bullet just off the lands. I’m fine at that charge weight but if I go to 30.0 grains the bolt begins to stick.

 

[Ccrider]

Every barrel is different. Using OCD brass, I worked up to 31.12 with no pressure signs.

 

[Dave Way]

This morning at 1K, just over 3”. Rifle by Alex Wheeler. Good old H4895 with a 205M. 30.70 grains behind a Hunter 103 gr. bullet in Lapua brass. Right at 3,000 fps. You have to love this efficient, accurate little cartridge!

The extra bullet hole was from a 6.5x47 seating ladder.

Dave.