Posted this on the CMPicon Garand forum, but I thought I might reach a little broader pool of experts by posting here too!

I've had a problem the last three times I've taken my H&R M1icon to the range.

Out of 40-50 rounds fired (LC69 the first two trips, HXP68 the last) after thirty rounds I would have several hits 8-10" low. Centered, closely grouped, but low. All other hits are in the black.

This is off a rest. I considered fatigue (it's getting hot in Georgia) but the last few rounds are back up in the black. I concentrate on sight picture, breathing, and make sure I'm not snatching the trigger. I've been shooting this particular M1 for 10 years or so with no problems.

It's not stringing, but a distinct low group. Sights don't seem loose. Any ideas?
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