I am working up a load for my 7mm STW using a 160grain Failsafe moly bullet, with 68-70 grains of Accurate XMR 3100. my question is this, should i use CCI large rifle or CCI large rifle magnum primers.
Thanks
Gene Cole III
I have been shooting the 7STW for years and have only used Fed 215 magnum primers. The large quantities of slow burning powder typical for this big case call for magnum primers.
A check of your loading manual should confirm the recommendation of magnum primers in the 7STW.
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