Gotta Love 108 Bergers
- Thread starter swadiver
- Start date
Secret supplier...I wish!!!! We have two main suppliers and almost the whole country has a back order in with one of them
bummer. i feel for you all
Would Jaime or Jason mind sharing their exact load with the rest of us 6 BRA shooters? I have not shot any 108's in my BRA but I have some and would like to know what loads others are using. Thanks, James
6BRAckley
Gold $$ Contributor
I shot 30.4 of H4895, Fed 205M primer, 108 Berger Lot #9950, .010 into the lands after finding the "touch" point, Lapua blue box brass, loaded round measured .2643 for a chamber with a .268 neck, Krieger HV 1-8 twist 28 inches long. If I forgot anything or you have any other questions I can answer I'll be happy to help out.
Edited to add: This brass was on its 4th firing with no annealing by me. I'll double check when I get home but I think I was using a .261 bushing from Whidden.
Edited to add: This brass was on its 4th firing with no annealing by me. I'll double check when I get home but I think I was using a .261 bushing from Whidden.
Thanks, I really appreciate this. James
johnnyi
Gold $$ Contributor
I shoot nearly identical load to Jason’s above with same barrel. I shoot 30.54 grains H4895, 205m primers and 7k into the lands with the 108’s. My velocity when I developed was 2920 during the cooler months of Texas. All 2 of em
as temps changed pressure was too much. Heavy bolt lift and primers started to open up. I have 7 firings in my blue box brass. Velocity jumped to about 2940-2950. Accuracy was still very good. But not like the cooler temps. I attempted to reduce the charge down to 2920. Groups opened up. So I spent some outings to resolve with different powder. I went to IMR8208 29.64 grains at 2885. Winter is back.. so I’m going back to H4895. It’s too good to pass up in my barrel!!
6BRAckley
Gold $$ Contributor
John’s post reminded me to mention that there might be another good node in some guns with less h4895. I am not even sure 30.4gr OR +0.010 was optimal for my barrel. I didn’t have time to do a complete investigation before the match I shot well at because of weather and work. Here is a pic of the ladder I shot at 550 yards — all at the same seating depth and charges of h4895 from 30.1 to 30.5. All 15 shots measured under 2.2 inches. I was real tempted to go with 30.1 (all 3 shots were touching at the 550 yards which I had never done before). I made a call to go with 30.4 because I thought 30.1 was too much of a gamble ... didnt have data for one side of it (30.0) and 30.2 was not impressive so I thought 30.1 might have been a fluke or too risky. 30.4 seemed to sync well with 30.5. I have set this rifle and barrel aside for the nationals so I will complete my load work up in March or early April.
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I shoot nearly identical load to Jason’s above with same barrel. I shoot 30.54 grains H4895, 205m primers and 7k into the lands with the 108’s. My velocity when I developed was 2920 during the cooler months of Texas. All 2 of em
And like you and Jason, I found success with a very similar load using 30.5g of H4895, 205M primers and +0.005 into the lands.
The only difference is I’m not seeing the speed you are as my load is running 2,875 fps in a 28” 1:7 Lederer barrel.
Had a local club shooter trying to get a load tuned for his newly chambered 6BR (Remington 40X action). He'd try different combinations and couldn't get anything to shoot consistently small. I always had good luck with Berger 108s in my 6BRs so I helped him develop a load with Varget and 108s. He consistently shot well (and small) at our local club 300 yard VFS matches with those 108s. He's never shot past 300 before - so I invited him to come down and give it a try at 600 yards at another monthly club match. He was hesitant at first - but he eventually made it down to give it a try. First time was more about getting used to shooting 600 and he did well and had a great time. He wanted to shoot 600 again.
Second time out shooting 600 - and he's shooting targets like this with those 108's:
Second time out shooting 600 - and he's shooting targets like this with those 108's:
urbanrifleman
Site $$ Sponsor
Has anyone compared the 108s at jam verses jump?
urbanrifleman
Site $$ Sponsor
Here’s the test I did
There are a lot of bullets that seem to shoot best 4 to 5 in... Nearly every bullet I have tested in the last year shot best at 4-5 thou in.
I shot 32.1 of Varget, CCI 450, 108 Berger with a .015 jump from touch, Lapua Brass (7th firing) neck turned by DJ for a 268 nk. I ended up settling on a .264 busing. The barrel was a 28” brux with a 1-7.83 twist chambered by Alex Wheeler. It was previously a Dasher with 280 plus rounds and I was not happy with it. Once Alex re-chambered it to the BRA, it started shooting really well with H4895 and I settled on 31.1g. It shot so fast that I decided to test Varget, and it shoot better.
I chrony’d the load after the nats and it was moving at 3040. I was once told by a great shooter to trust my target, so I rarely use a chrony, this was more out of curiosity. This lot of Varget has consistently run best at 32.1 in the 6Bra and 32.7 In the Dasher.
Jaime
I chrony’d the load after the nats and it was moving at 3040. I was once told by a great shooter to trust my target, so I rarely use a chrony, this was more out of curiosity. This lot of Varget has consistently run best at 32.1 in the 6Bra and 32.7 In the Dasher.
Jaime
30.5 h4895 jumping .026. Sb primer was doing about .2 moa with very little vertical at 200 yards but never got it quite where I wanted so haven’t tested that load at longer range.
moondog
Gold $$ Contributor
I tried the 108s today. The wind was less than ideal. 12-18mph 9:00. All tests were done at 700 yards. Dasher 8 twist Hawk Hill. 26"
31.2 to 31.8. Jam .010 to jump .020.
Jammed. 010 was the clear winner with 31.6 H4895. 31.8 was starting to show pressure.
210m primers. I'll revisit with .005 jam and 30.5. Velocity was right at 2920. Little to no vertical. I'm liking this bullet so far. Wind picked up on the 3rd shot
31.2 to 31.8. Jam .010 to jump .020.
Jammed. 010 was the clear winner with 31.6 H4895. 31.8 was starting to show pressure.
210m primers. I'll revisit with .005 jam and 30.5. Velocity was right at 2920. Little to no vertical. I'm liking this bullet so far. Wind picked up on the 3rd shot
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are those the ones you got from me?
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