I just ordered a can of 209 for my sons cva accura the gun tack drives bullets with cci 209 and 100 Gr. of triple 777
The first shot no problems but to reload the second shot it starts the crud ring NO WAY A THIRD shot without running a patch down the bore.
I like to ask what are the best primers to use with the 209 I read a lot of guy have no problems with getting a few shots with BH powder

I prefer Win209s but if CCIs are working fine with T7, give them a try. If you have the long quick release plug then try the CCI209M primer.

My go-to primer for BH is Rem STS but I don't hunt extremly cold weather. Win 209s works good for me as well.

CCI 209 Magnum

Once you get the primers, then you can adjust the headspace for a tight blow by free fit.

I think it was .014 to .016 ??
that for the accura V1