Hodgdon benchmark and campro 223 55 grain

Skiman

Skiman

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Anyone have a good recipe?

I see the Campro reloading data states a COL of 2.260". The Hodgdon COL for a 55gr SPR SP bullet is stated at 2.200" on the Hodgdon website with a max load of 25.6 .

I was thinking of trying the benchmark and working a load up for the campros. It is for a 1 in 9 twist M&P15 sport 2.

Anyone have any info to share on the proper COL and a successful powder charge for this purpose? Is there reloading data for Benchmark and Campros somewhere?

Thanks.
 
ht tp://campro.ca/en/products/bullets/223/223-55-bt-fmj

If you go on Campro website, there is a loading data download.
 
kawicrash said:
Book COAL is just for reference. It will depend more on your rifle's throat, magazine, and depend if you want to use the cannelure.
Click to expand...

That sounds reasonable. So I can just stick to the campro max load COL an just work up a load to the max listed for 223 on the benchmark? I understand there is quite a significant safety margin built in, so that as long as I don't go over by like 25% on the powder, I should be ok?
 
For a semi-auto, COAL will be driven more by the limitations of your magazine.

Choose a COAL that won't cause bullets to jam in the mag and work up a load from min to max in 0.3 to 0.5 grain increments. Shoot them in increasing charge weights and look for pressure signs (e.g. primer flattening or cratering, ejector marks, hard extraction, etc.). There is lots of guidance in these forums and on the internet on load development for accuracy but there are a few alternatives. Choose one and try it out.

Good luck and be safe.
 
Pr589 said:
For a semi-auto, COAL will be driven more by the limitations of your magazine.

Choose a COAL that won't cause bullets to jam in the mag and work up a load from min to max in 0.3 to 0.5 grain increments. Shoot them in increasing charge weights and look for pressure signs (e.g. primer flattening or cratering, ejector marks, hard extraction, etc.). There is lots of guidance in these forums and on the internet on load development for accuracy but there are a few alternatives. Choose one and try it out.

Good luck and be safe.
Click to expand...

Thanks. That all sounds reasonable.
 
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