I have found the problem!!
My reamer was on the minimum allowable tolerance for a 300 ultra match reamer.
resized to fired brass was just under .002 on the body, my findings were that we need to have .003 difference from fired to resized. I took my 7 ultra mag reamer(match grade) and ran it in the 300 ultra chambered barrel. according to the prints the dimensions are identical on the body and took out approx .0015, then I loaded up a new case with 92gr. of retumbo and a 210 Berger. Velocity was 3100 FPS. I proceeded to reload and fire the case three times with 92 grains and the case just fell out every time. No extraction cam was even being used. So, I took her up to 93 grains and still no extraction problems, then I went to 93.5 grs. and again zero extraction problems, worked smooth as butter every time. It will not hold primers after 5 firings, ES was under 10FPS, accuracy was sub 1/3 moa at 600yds.
I am relieved to have found the problem, but would like to offer my apologies for letting this out of my shop. This has been a big learning experience for me. In my test firings everything was fine as I used new brass every time. Also this is not causing extra pressure in your guns as your bolt lift is still easy until it hits extraction. The body of the brass is just not pulling back off the chamber and dragging. I have determined there is no real safety issue here as velocity does not increase even when the cases are sticking, just a very large annoyance!
I would like to fix the problem on all the 300 RUM's I have out. if you are having this problem, which I suspect you are.....I am willing to pay shipping both ways
and get them back to you as soon as possible. Please contact me if you have one of my SSG built rifles and are having this problem.
For those that are having this same problem and that do not have SSG built rifles it is very likely you do not have enough clearance between your chamber and resizing die, weather it be wildcats or standard chamberings. I believe this "sticking issue" is something we will only see in the large diameter high power magnum cases. In the near future I will do my best to go through my records and contact all my customers that have bought SSG 300 RUM's and make them aware of my findings and restitution offer.
I would ask that you would be patient with me at this time as I am truly overwhelmed with the hunting season rush as well as hoping to do some hunting myself. In other words, if you e-mail and I do not get back to you right away, I am not ignoring you I just haven't been able to respond as quickly as I would have hoped.
I hope others can learn from these posts. I am truly thankful for all your replies.
You guys are awesome!
I wish you a great hunting season!!