My .375 put 3 300 grain Federal Premium TSX onto paper with the holes touching a few years ago. POI was within an inch or so of the bullseye. Clearly the gun is capable of shooting very nice.
This weekend I shot some handloaded 300 grain Partitions that were loaded in 1 grain increments from min. to a bit below max with IMR4064 in the Lyman manual. The POI was about 5 inches low and 3 inches left and the groups were around 3-5".
Although un-happy with the groups I was more curious about the POI. Is it realistic that these handloads would change POI by 5" or has my scope lost zero? If the factory TSX were not $4 a round I would be much more tempted to go shoot a few but I thought I'd check with the experts first!
Thanks in advance!