Thread: Model 7 7mm08 150gn eldx load development

Originally Posted by dannyb

Was hoping you'd chime in thanks you have re-enforced what I probably already knew subconsciously....

Greetings again @dannyb,
After my post I did what I should have done earlier and went back over earlier data. It appears that Hodgdon/ ADI have dropped their max load of AR2209 with the 150 grain projectile from 48.5 grains to 45.5 grains likely in responce to the increased powder speed. I also spotted that you are using Federal cases. These weigh around 179 grains compared with 164 grains to 169 grains for just about everything else. This results in reduced case capacity together with increased pressure and velocity. The extra 10 to 15 grains of case weight works out to about 1.1 to 1.7 less grains of case capacity. I loaded some rounds in different capacity .308W cases a while back to get a better idea of velocity impact but have yet to shoot them. Go shoot some deer with those loads and the Federal cases might look a bit better.
Regards Grandpamac.

Originally Posted by dannyb

Also I'm not that thrilled with the federal brass and considering "biting the bullet" and investing in lapua brass whilst I still can, is this likely to vastly effect my loads ? (Should I stop and wait till I have new brass and start again ?)
Thanks in advance

My personal experience with 7mm08 lapua was it was far less capacity than other cases. I couldn't get to max book loads without stamping. Not a bad thing though same preasure for less powder!

Originally Posted by Hunty1

My personal experience with 7mm08 lapua was it was far less capacity than other cases. I couldn't get to max book loads without stamping. Not a bad thing though same preasure for less powder!

Did that result in same speed for less powder ?

Now wondering if I should get Lapua or Norma

Originally Posted by grandpamac

Greetings again @dannyb,
After my post I did what I should have done earlier and went back over earlier data. It appears that Hodgdon/ ADI have dropped their max load of AR2209 with the 150 grain projectile from 48.5 grains to 45.5 grains likely in responce to the increased powder speed. I also spotted that you are using Federal cases. These weigh around 179 grains compared with 164 grains to 169 grains for just about everything else. This results in reduced case capacity together with increased pressure and velocity. The extra 10 to 15 grains of case weight works out to about 1.1 to 1.7 less grains of case capacity. I loaded some rounds in different capacity .308W cases a while back to get a better idea of velocity impact but have yet to shoot them. Go shoot some deer with those loads and the Federal cases might look a bit better.
Regards Grandpamac.

I was happy with every other aspect of the federal cases the neck tension felt consistent when seating, just the primer pockets felt like there was quite a variance in pressure required to seat the primers using an rcbs hand primer....

Originally Posted by dannyb

I was happy with every other aspect of the federal cases the neck tension felt consistent when seating, just the primer pockets felt like there was quite a variance in pressure required to seat the primers using an rcbs hand primer....

Ive personally had rubbish experience with federal brass, as you mentioned sloppy primer pockets varying throughout the same lot of brass. Made the switch to starline in 7mm08 and have had awesome results

Originally Posted by dannyb

Did that result in same speed for less powder ?

Now wondering if I should get Lapua or Norma

Yes

Hi Danny I'm using Laupa brass in the 7-08 I'm working a load for at the moment.
I'm using 2308 and 150 ELDX from a 20" Tikka seated to mag length.
I did a ladder last night and went up to 40.6 with that giving me 2726fps but a slight stamp and some weight on bolt lift.
I've loaded 10 of each 40 and 40.2 as both were around 2675fps and showing no pressure. So I'll shoot them for groups when the rain stops probably tomorrow night.

Sent from my CPH1903 using Tapatalk

@dannyb

Looking at Quickload, 2209 isnt a great choice, you will be @ 108-110% fill rate, hence the crunching powder. You are only at a burn rate of 90% in the 17" barrel, and the velocity isnt as high as you could get with a few other powders.

2206H gives much better fill rate %, far higher burn rate, and far better efficiency % and higher velocity.

H414, CFE223, BL-C2 and Re17 are all better again in all those regards (if you can find any of them of course)

Also, don't forget projectiles such as the old school softpoint Sierra Gamekings or Prohunters or the Speer's. When i first started Handloading i used 130gr Speer Hotcors, only doing 2800 fps from a 22" barrel, but man were they accurate and performed extremely well on deer/goats, every single animal i shot with them fell over very quickly. Ive found these simple older bullets shoot very very well and with a decent sized lead soft point they also expand and perform very well.

I still use Sierra Gamekings/Speers as a mag fit load in my 284 and 7mm Saum. But I appreciate at these times, you gotta use what ya can find.

In all reality with a 17" 7mm08 intended for close to medium range you dont really need anything else.

+1 for hotcors. 145s in 7mm are vicious and found really easy to get shooting well. Crap bc as flat base but inside 350 doubt you will pick it

Originally Posted by superdiver

+1 for hotcors. 145s in 7mm are vicious and found really easy to get shooting well. Crap bc as flat base but inside 350 doubt you will pick it

Granted pretty much any soft point would do the buisness and whilst this rifle is predominantly 0-300ish yard rifle I'd love to have the confidence to stretch it further should the situation arise.....is 450-500 yards asking too much ftom a short 708 ? The figures suggest not.
The golden phrase being "should the situation arise" not "this is my new long range hunting rig"

@dannyb

For you're rifle I'd use ADI's pistol data.

The reason it's based off a 15" barrel


The 7mm08 for a rifle is based on a 24"barrel


Albeit they dont have data for the 150gr Eld X.

I used the data for the 162gr load for my 160gr TMK out of my model 7.

COAL of 2.780
40.0gr 2208

Mv 2430fps


Hope this helps

Norma brass Danny.

Originally Posted by dannyb

Granted pretty much any soft point would do the buisness and whilst this rifle is predominantly 0-300ish yard rifle I'd love to have the confidence to stretch it further should the situation arise.....is 450-500 yards asking too much ftom a short 708 ? The figures suggest not.
The golden phrase being "should the situation arise" not "this is my new long range hunting rig"

Yeah if it holds enough velocity and energy and precision out to 450-500 you should be fine should the need be there one day.

With my 15" 708 pushing 140 nbts at 2720 fps it holds in excess of 1800 fps and 1000+ ft lbs to 500 yds.

Ive practiced out that far with it and validated my drop data and would be happy to take a shot in the right conditions if the situation arrised.

Originally Posted by Rock river arms hunter

@dannyb

For you're rifle I'd use ADI's pistol data.

The reason it's based off a 15" barrel


The 7mm08 for a rifle is based on a 24"barrel


Albeit they dont have data for the 150gr Eld X.

I used the data for the 162gr load for my 160gr TMK out of my model 7.

COAL of 2.780
40.0gr 2208

Mv 2430fps
Attachment 173204

Hope this helps

Very interesting, until today I had no idea a 7mm08 pistol was a thing

Originally Posted by dannyb

Very interesting, until today I had no idea a 7mm08 pistol was a thing

Yep sure is

284win is also chambered for single shot pistols.

Or 270 pistols with 12" barrels like the the remington XR100 series.

We use em here for Metallic silhouette shooting but stateside they can use em for hunting in their handgun seasons.