I have a Mossberg 500. I'm thinking about getting my stock cut down to a better fit. Is there a way to tell you how long your stock should be? This was never a problem when i used to modified barrel and shot birdshot or even buckshot out of it, because i didn't have a scope. But now i put a slug barrel and scope on it. It's just to long. It doesn't fit right and especially when i'm wearing a heavy jacket in the winter. The stock doesn't even come into my shoulder. It sorta just makes it in the middle of my muscle. If anyone has any info on this i'ld appreciate it.

thanks