Breach Seating O.K. with smokless???

[barrabruce]

I played around with a bit of breach seating Last week-end.

I have a rather long chambered neck and normal length necked cases.(sudo weatherby freebore I presume)

Questions are.

Is it o.k. with smokeless powders?? (up to full blast)

I am seating the bullet so it is still fits in the unsized case neck when loaded with a tuft of dacron/hrdrofill over the powder so it will compress down when the case is chambered.

I could set plain cast into the bore more but I have a big free bore before the smaller throat.Errgh

The paper patched seemed to work o.k. althou still dismal results. :grin: Working on a few things.

Could I use jacketed stuff as well???
I know the pressure would be higher and thus I would have to start lower.

Planning on some plain cast as well.

I just don't want to end up ringing the chamber or something worse.

Thought I'd better verify before I put the firing pin through the back of my head or worse have to live with being the wanker who blew himself up with hair brained ideas.

Thoughts ..facts appreciated.

Barra

[pdawg_shooter]

I do this all the time when I am looking for max accuracy, except NO filler. I use a powder that will give me as near as possible to 100% load density. I was able to get just over 3000fps with MOA accuracy in a 300RUM this way.

[barrabruce]

Thank you Pdawg.