New to 6BRA. Load input

[savageshooter86]

So I have a 6BRA using Alpha BRA brass. Having sticky bolt lift. At 2920 range

272 chamber neck. Loaded round .2685. Fired neck 211
237 bore Kreiger 8 twist.
wheeler no turn reamer
105 target vld
H4895
CCI400
Plus 10 from touch using Wheeler method

Bolt lift is just barely sticky. Also have a couple primers that have vertical mushroom like pressure sign. Like a nipple on the firing pin strike.

Firing pin is clean. Bolt assembly is clean.

 

[ngb1787]

So I have a 6BRA using Alpha BRA brass. Having sticky bolt lift. At 2920 range

272 chamber neck. Loaded round .2685. Fired neck 211
237 bore Kreiger 8 twist.
wheeler no turn reamer
105 target vld
H4895
CCI400
Plus 10 from touch using Wheeler method

Bolt lift is just barely sticky. Also have a couple primers that have vertical mushroom like pressure sign. Like a nipple on the firing pin strike.

Firing pin is clean. Bolt assembly is clean.

How is grouping? When I have any bolt lift I decrease charge by .5 grains and reassess.

 

[Ranger007]

6BRA load data

I thought this thread could be useful. Interested in hearing all the different combos you guys have found success with.

forum.accurateshooter.com

 

[DHuffman]

I experienced the same on the first firing of my Alpha brass wth CCI 400s and switching to BR 4s helped. After getting them all FF the lift and craters completely went away.

 

[savageshooter86]

I experienced the same on the first firing of my Alpha brass wth CCI 400s and switching to BR 4s helped. After getting them all FF the lift and craters completely went away.

That’s interesting. I was thinking switching primers possibly

 

[savageshooter86]

6BRA load data

I thought this thread could be useful. Interested in hearing all the different combos you guys have found success with.

forum.accurateshooter.com

Yes have every load written down. And read a lot before load work. No one I saw had this issue that I’ve read with Alpha brass

 

[Ranger007]

Yes have every load written down. And read a lot before load work. No one I saw had this issue that I’ve read with Alpha brass

Roger that. Just thought it might contain some useful info regarding your situation.

 

[Evan]

I see that brass smearing with my Borden when I get on the hot side. It has such a strong, well-timed extraction cam that the brass smear on the boltface is my first sign of excessive pressure. If I wait for my bolt lift to get heavy, then the loads are nuclear. If you back down a couple tenths, does the sticky lift go away? You may just have a less optimally matched brass-die-chamber setup.