I have been shooting a lot of my reloaded 9mms lately and I keep finding that they are just not that accurate. I am shooting a fairly new, about 1k through it, G34 with stock barrel. So this weekend I tested my ammo compared to some Factory Federal 115gr FMJ and the federal was making groups about half the size of mine(recipe below). I had a good warm up session then at 15yds shot 3 five round groups of each with the best being 4/5 touching with Federal and my ammo grouped twice as large.
I have just gotten into reloading for 9mm (been doing .45, .38, 357 for years)and after a lot of time on the web, mostly here, I decided to try the following. I am loading 124gr MG FMJ, 4.2 gr of W231, with federal SPP, in mixed mostly once fired brass, COAL about 1.12in, using a Dillon 650. I don't really know on the crimp, it's just enough to remove any bell.
Any Ideas on how I can improve this?