Had that problem with a classic hunter I purchased new back in the 80's. Had nothing to do with the load. Sent it back to them and they made some internal adjustments. Too many years ago to Renner the specifics so do your self a favor and send it back.
can someone tell me if serial number prefix ANR5125 is correct for a Lew Horton 629-1 and what was the mfg date ? Is this info in the s&w standard catalog and if so where ?
Thanks