Took the Ishapore back to the range to adjust zero and double check the load. (IMR4064 and Sierra 165 grain HPBT). After adjusting zero, fired a 5 shot. 1" group at 100 yards. It has a 2-8x scout scope mounted.
Looks like I'll be having issues getting any more powder. IMR4064 seems rare, and N140 with a very similar burn rate was a no-go at 2 on-line sources I checked. It has a shortened barrel so I probably need to stay with that burn rate and bullet velocity.
