My isn't but my barrel has a 1 in 7 twist so 55gr isn't the best choice. It likes 62 grain Brown Bear just fine so I don't think its really picky about what ammo you feed it but a heavier bullet will help your accuracy.
Mine does not like light bullet loads. What was SIG USA thinkin putting a 1/7 twist barrel on the rifle??
That said, mine runs fine on Russky ammo as long as it is 62 gr +. As stated, it is a heavy rifle but it functions well with anything I have fed it. YMMV
Thanks for the info guys. Damn the luck, I just purchased about 400 rounds of 5.56 55 grain yesterday. I guess I'll start looking for some heavier stuff now.
I wouldn't sweat the 55gr, I can shoot sub MOA with a Aimpoint at 100 yards with my friend's 556 shooting 55gr, you shouldn't have too many problems with the light rounds if you're keeping it under 200.
I wouldn't sweat the 55gr, I can shoot sub MOA with a Aimpoint at 100 yards with my friend's 556 shooting 55gr, you shouldn't have too many problems with the light rounds if you're keeping it under 200.
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