I have been using my 09 to shoot the National Match centerfire course and to do this I have modified the 09 with lightened trigger, hammer and firing pin springs along with reshaping the hammer and sear to bring the single action pull down to 3 lbs. With this sear mod I had to remove the DA potion due to timing issues when firing single action. This has worked out fine so far for the intended purpose of shooting the Bullseye centerfire course.
After firing at 50 yds off of the sandbags I'm getting 4-5" groups (10 shots) which are not good enough. I need to get 10 shot groups under 3.4" in order to have the potential of a clean target at the 50 yd line.
The load I'm using is all cases matched headstamps, 3.9 gr of Red Dot, a 115 gr plated bullet with CCI 500 primers and a crimp set to apply a .377" taper crimp measured at the case mouth. This shoots consistent groups with no flyers.
So my question comes down to what can be done to the P-09 to reduce the groups to get to the 3.4" needed. Is it a barrel replacement (does anyone sell a match grade barrel for this?) Can something be done with the barrel lockup in the slide and can anything be done to the frame slide interface to tighten up the groups? Or is there something else I haven't considered.
Any suggestions would be appreciated
Thanks