Re: HELP!! ejector marks on brass???
the high point of expansion is in the web area. It starts to be measurable about half way down the body and increases to the web. The expansion is usually only there after the first firing of the brass in this rifle. I use a full length resizing die set to push the shoulder on the brass back about .002" every time I reload. The bullet is seated to be about .075 away from the rifling of the barrel (which I found by taking a bullet and blackening it with soot from a match then putting it in a once fired case that had been pressed against the table just enough to hold the bullet in place. I then chambered the dummy round and let the rifling seat the bullet. I seated it .002" deaper using the press and die and resutted the bullet then chambered it again, no sut rubbed off and I use this length as the point of contact to be safe) The .075 above is right in the middle between the recommended COL and the contact point.
I have been shooting this rifle for 10 years now and fired several thousand rounds through it, mostly reloads. I use only winchester brass because it is affordable and consistant enough for me. I do not have a chrono, so no I haven't shot over one. This weekend I am going home to see my parents and might be able to borrow my uncle's if the speed is important info. for the reloads.
I thought the ejector marks were a sign of high pressure in my reloads and was hard on the brass. I got the factory loads specifically for the brass, but they had the ejector marks as well after the initial firing. The comment about it maybe being oil in the chamber makes some sense to me because of the cleaning only an hour or so before the factory loads were fired.
I am really appreciative of the help you are all giving me.
"I am a stone. I do not move. Very slowly, I put snow in my mouth and he won't see my breath. I take my time. . . I have only one bullet. I aim at his eye. Very gently, my finger presses on the trigger. I do not tremble. I have no fear"