Never seen a difference with 38 loads and magnum primers. The only magnums I reload are for my 77-357 rifle.
Magnum primers in non-magnum loads.
- Thread starter Plinkasaurusrex
- Start date
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The design of the MAGNUM primers means a longer spark (brisance) to better ignite harder to ignite magnum powders! This in itself doesn't mean higher pressure! People have reported all manner of differences when using magnum primers in non magnum powders. From higher to lower velocities to wider and narrower S/D!
As in the above my chrono only saw about +25 FPS with popular powders and 9mm Minor PF loads.
The same for 38 Spl. For 45ACP Winchester primers are LPP/LPPM loads!
As a reloading instructor I can only advise to use published recipes. As noted above start with reduced loads and work up if choosing to use SPPM primers!
Smiles,
The design of the MAGNUM primers means a longer spark (brisance) to better ignite harder to ignite magnum powders! This in itself doesn't mean higher pressure! People have reported all manner of differences when using magnum primers in non magnum powders. From higher to lower velocities to wider and narrower S/D!
As in the above my chrono only saw about +25 FPS with popular powders and 9mm Minor PF loads.
The same for 38 Spl. For 45ACP Winchester primers are LPP/LPPM loads!
As a reloading instructor I can only advise to use published recipes. As noted above start with reduced loads and work up if choosing to use SPPM primers!
Smiles,
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Due to lack of supply given current climate i have been using LMPP in my .45s with no noticeable difference... i recently was abil to source some standard LPP so ill use them in my 10s... if i ever have to run LMPP in my 10s ill approach max with caution
