Does anyone have any Berger 108 bt load data that they could give me.
I’ll be loading for 6mm creedmoor in hornady brass with H4350 and 24” barrel.
I suppose that I could safely start at 38 grains and work up from there?
Just wondering if anyone has the data so that I know where the top limits are.
Thanks,

I don’t shoot a 6cm, but I’d say the best thing to do is to use google, read on good quality forums like accurate shooter or snipers hide and just make some notes of what those guys are shooting load wise. From what I saw looks like between 41-43 grains is gonna be the top, I bet you find a load around 42.2-42.8 grains.
Then study the book with your particular bullet and see what the charge weights are. It’s best to start low and find max in your rifle, they are all different and can do some strange things. Pressure can be funny..

I’d run the bullet at a magazine length to start.

I’d probably start 2-3 grains below book max and work up in .2 to .3 of a grain increase, load 3 of each weight shoot and whichever makes one hole load 10 and see if you can do it again.. you’ll probably find something pretty quickly.

What type of dies and powder measuring device/ method are you planning on using?

Tab, you must be a better internet sleuth than I am. I couldn’t find anything about 6CM and Berger 108 bt. All I could find is 6br, 6xc, 6x47. The 6x47 should be close. The usual way I work up with a modified OCW. But for that, it’s quicker to know the top limit so that I can calculate down from there. I’m not looking to push as hard as possible, I’d take anything accurate between 2850-3100. I’m loading with a charge master, Redding competition bushing dies and an expanding mandrel as a last step to set up neck tension on a rock chucker.

Well, Berger is kinda awesome. I emailed them this weekend and received a reply to call them back this morning. I called the number they gave and they answered the phone right away and gave me the load data. Great customer service from Berger!
6CM
Berger 108BT
H4350
Start- 36.0
Max- 40.5
OAL- 2.800

One thing good to note...Berger is CONSERVATIVE as hell.

You can use 105 data for a 108, there isn't much difference in bearing surface but I normally will start a few tenths to half grain low. I 100% agree with TAB though...you're likely going to find something around 42-43.

Right now on a barrel with 25 rounds on it...I'm running a 105 hybrid at 42.2 H4350 and it's just north of 2900. I suspect I'll hit 3k once it gets through the early funky period...oh yeah, I'm running a 20" barrel. Good luck.

Berger's maximum is often a good place to start, and go up from there.

Very conservative, like Judd said.

Perfect Judd, that was one thing I was wondering about the 108 is what the difference in bearing surface is to the 105. Using 43 as a top limit while planning my OCW will still keep me under Bergers claimed max when I am making the bigger jumps toward the beginning of testing, so that should work out for me. Ill be loading for a 26" barrel, so I should hit my desired velocity at a lower charge than with a 20" barrel. Seems to me anyway that the Hornady brass probably has one of the higher internal capacities which would point me also toward that Bergers data is conservative in my application.

I appreciate all of the input!

I was looking at 105,107, 108 data that the guys on snipers hide was discussing the 6cm is very popular in the prs groups since it’s such a flat shooter. One guy claimed only 9 mills elevation from a 100 yard zero to get to 980 yards.
I’m sure it’s possible..

Judd is right about Berger data really conservative.

I bet you find a load between 41.8 and 42.5 or so..

Thank you TAB. I appreciate the info. Its for the wife's rifle. Currently she is running 108 eldm with 41.3 of 4350 for 3030 fps. Unfortunately the 108 eldm is unobtanium and all we could find is the Berger 108. I don't think we are going to dislike the Berger 108, I just don't like all of the time and effort that has to go into another work up due to component shortages..... I am running 115 dtacs in my 6cm with RE16 and wouldn't mind for both of us with that bullet, but those are not to be found right now either! Heck, I may end up having to steal some of her 108's to run in mine, i've only got 150 more dtacs left.

You might give Barts Bullets a go, they are custom, you have to wait but are excellent consistency.

Took an initial load development out today and it does look like I’m gonna end up pretty much on your numbers TAB. There’s a velocity node between 41.6 and 42 that gives me about 3020fps with low SD and 0.5 moa grouping on both loads. I’m going to be testing 41.8 next with some seating length variation and am pretty sure that’s where I’ll end up. Thanks again for the advice, I don’t think I would have brought those higher charges out with me if you didn’t say anything.

Straight from Berger:

Optimum Loads in Order: 108 gr. Elite Hunter ; COAL 2.800" ; 26" Barrel

Start FPS Max FPS
H4831 SC 39.5 (2,702) 43.6 (2,993) (100% Case Fill)
RL-19 38.5 (2,741) 42.6 (3,023) (99%)
H4350 36.0 (2,656) 40.5 (2,955) (96%)
RL-16 35.5 (2,761) 39.7 (3,043) (95%)

I am not responsible for any accidents due to poor reloading practices or telling you to load to these specs. These numbers are straight from a technician at Berger Bullets.