Tightened up the forearm. Didn't know it was something that could be done until I noticed the screws under th forearm and read the manual.
Loaded some test rounds with several different cast and jacketed bullets with charges of 2400 low to high. OAL out to 1.73".
Various rest positions including under the receiver.
No improvement.
Next up is the scope. I have several to choose from but doubt if I'll have time today.
