[MileHi]

That is my concern, although I think a bent op rod is the worst case.

I just need to go mess with the gas plug I guess.

[Lurker]

That is my concern, although I think a bent op rod is the worst case.

I think Eaker might have a slightly different opinion of "worst case".

[labette]

"I just need to go mess with the gas plug I guess."

Don't get in a hurry to do anything like this. It is wise to keep the ammo as close to original M2 ball spec as possible. The good news is that most of the common 150 grain under 2950 fps ammo is pretty darned close. The Springfield folks aren't dummies.

What WILL cause you problems OVER TIME is heavier bullets and/or slower "magnum" type powders that raise the pressure at the barrel end. This gives the op rod a "hammer blow" instead of a more desirable "gentle push".

[DuncanWaring]

That is my concern, although I think a bent op rod is the worst case.

I think the worst case for "high gas-port pressure" is "heel of the receiver breaks off and the rifle bolt embeds itself in your right eye".