Thread: .223 results

I've built a simple spreadsheet tool to overlay multiple groups to understand larger samples of shot distribution and calculate mean radius - I sent to Tentman but if anyone else wants it and the instructions let me know.

Loaded up two sets of 10 rounds with 40 VMAX, to ADI book COL.
BM2 powder, Sako brass
26.5 and 27.5 grains. Quite a full case but electric toothbrush helped it settle enough.
Hopefully shoot in weekend and report back.
Found a place crawling with rabbits in rural Wellington region so hopefully some maximum bunny destruction to follow.
Should be around the 3600fps mark so point and shoot to a fair way out.

Originally Posted by McNotty

Loaded up two sets of 10 rounds with 40 VMAX, to ADI book COL.
BM2 powder, Sako brass
26.5 and 27.5 grains. Quite a full case but electric toothbrush helped it settle enough.
Hopefully shoot in weekend and report back.
Found a place crawling with rabbits in rural Wellington region so hopefully some maximum bunny destruction to follow.
Should be around the 3600fps mark so point and shoot to a fair way out.

Got out to shoot these. Both 10 shot groups.

First shot of day put me a bit high from point of aim so come down a bit. Fair bit of wind and shooting off trailer behind SXS so not ideal conditions. Shot well enough for me. Pretty sure the outliers are due to the conditions and not the rifle but I’ll have to wait and see when I zero it.

27.0 grains



27.5 grains (ADI book max)

Nice. My "Black Beauty" 223 build should be with me this week, it's a 1:7 and will run 69s I hope. I'll be pleased if it goes like yours!

Originally Posted by Tentman

Nice. My "Black Beauty" 223 build should be with me this week, it's a 1:7 and will run 69s I hope. I'll be pleased if it goes like yours!

Thanks man. All the best with her.
First load development using this new method you guys have been talking about. Probably could’ve stopped after a few rounds of the lesser charge when I didn’t get pressure and moved on to the max charge.
Looking forward to some rabbit destruction later on in the week.

Will a 1:9 wist stabilize the 70+ gr projectiles or should I be looking at lighter?

Thanks

Originally Posted by imaca

Will a 1:9 wist stabilize the 70+ gr projectiles or should I be looking at lighter?

Thanks

My 1:9 stabilises 74 gr Targex and Ive read that they will do the 73eldm. That would be the limit though.

Originally Posted by imaca

Will a 1:9 wist stabilize the 70+ gr projectiles or should I be looking at lighter?

Thanks

I would verify the twist with a cleaning rod. Some 9 twist were a little short. My Ruger Hawkeye is a genuine 9 twist. My Savage 9 twist are 8 5/8. I can shoot the long 75gr Amax from the Savages with no stabilization issues. Haven’t tried a 75 ELDM yet. My Ruger shoots the Hornady 75gr hpbt and 77 TMK and 75 SBBT with no issues.

It’ll be sure to make them pop I shoot the 55gn at similar speeds and holding high on a rabbit still hits at 250-300yards

Originally Posted by Kelton

It’ll be sure to make them pop I shoot the 55gn at similar speeds and holding high on a rabbit still hits at 250-300yards

I’ll run a 1” high zero. Point and shoot anything from on my knee to 200, and top of back for 250.

Originally Posted by gimp

I can email you a spreadsheet template and instructions if you want

@gimp could you please email me the instructions and spreadsheet? I’m keen to have a play. You and Tentmans posts fascinate me.
I’ll PM email

Originally Posted by McNotty

@gimp could you please email me the instructions and spreadsheet? I’m keen to have a play. You and Tentmans posts fascinate me.
I’ll PM email

Sent - post your data !