Recent content by gophernator

Be aware of the twist rate in your barrel. Those 180+ bullets prefer a twist @ 1:8. If you're running slower twist rate, try the 160 range bullets. One of my SAUM's loves the 168 Sierra Tipped Matchkings,. It runs a 26 inch barrel with a 1:8.5 twist off the end of a short action at about 2875...

This may seem a bit out there but it works amazing. I sonicate pistol brass in my ultrasonic cleaner after covering it with SS pins. I use 5-10 squirts of Dawn Power wash in the gallon of water that the ultrasonic tank holds. I use a large tea strainer to hold the brass & pins while it is in...

I run H4831SC in my 7SAUM. It's a 26" Krieger 5R barrel without a brake. Muzzle velocity is about 2875 fps with 58.4 gr of 4831SC pushing a 162 gr AMax (unobtainium version from previous decade) out of Nosler brass using CCI BR2 primers. Consistent correlation between cold bore shot and...

I have recently been experimenting with Dawn Power wash as a substitute for Lemi Shine. Works like magic in a sonicator at 5 squirts per half gallon on 223 and 9mm brass. No adverse effects on brass after 5 reloading/firing cycles.

The other problem may be very slight difference in the case diameter at the primer/rim. A couple thousands difference can definitely cause the issues you are seeing. Compare the diameters just above the base with your calipers. Five thousands is enough to prevent bolt closure. Good luck!

I have found that one can take discarded powder (from pulled rounds etc) and put it into low temp melted wax then let it re-soldify with cooling. You can form it into a convenient block by hand. Use about 10 parts wax to 1 part powder.

I am totally new here but a long time 7SAUM shooter. Where would I get reamer or reamer specs for the 7SS? Thanks