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Discussion Starter · #1 ·
My pre-ban M1A supermatch (glass bedded, oversize stock, etc) has begun to show a point-of-impact drift as the barrel warms up. After 5-7 shots at usual slow fire rate (about 1/min), the POI drifts up and to the right by about 2 inches. Still groups well (<1.4 in) with SMK 168s if I do my part. Any ideas? Sounds to me as thought the stock or some other part is binding? Any of the technically adept guys seen anything like this? How do I fix it?

Thanks
Bill Calhoun
 

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How's your glass bed - still tight or is it a few years old with lots of dissasembly?
And/Or - how's the pressure on the tip of the stock and the ferrule? Should be firm, if loose, that might do it.
That's my best stab at it.
 
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