I have found it all depends on what bullet I am shooting. Used some on 180"s ok, but had to reduce load slightly. On 165's I could not tell a lot of difference with what I was using....Have not tried it on 220 and 240's...I started using spp's by pure accident. Had a lot of small primers I bought years ago and thought they were srp's. Thought I would try them since the rem. 7.5 weren't working too good. Since I was starting with reduced charge and low pressure, it turned out ok. Reloading for 30 yrs. and still messed up...It was ok in my guns, but I do not shoot AR's.YET!
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