View Single Post
Old April 25, 2005, 07:49 AM   #5
Senior Member
Join Date: April 3, 2005
Location: Rochester, New York
Posts: 2,136
I tend to agree with cheygriz on the problem of not getting enough pressure to expand the necks,,, but,, you are within a couple of grains of a max charge of 4064 also. Therefore it does seem strange to some degree, your neck expansion isn't over the top, but is somewhat larger than my 308. I tend to get case mouth blackining mostly when I use boat tail bullets. I have assumed that the bullet releases and some of the gasses slip back past the boat tail before the case mouth has had time to fully expand. It really isnt a problem and will do no harm, just a little unsightly. I have seen many guns do this to some degree with no ill effect.
Ruger4570 is offline  
Page generated in 0.03258 seconds with 7 queries