I agree with Futz', with an AR and all the martial connotation and expectation that goes with it having a muzzle device is 'de rigeur'. A military assault rifle without a muzzle device is akin to being naked! But, when you think about the SR25 and how it is often shot without a can, 308 recoil as well, it is not much of a leap to consider nothing on the end to interfere with exiting gasses and pressures.
A case in point is the Lilja M4 'Navy' .223 Wylde drop-in. With a can on the end it gets filthy extemely quickly, caking a layer of ceramic burnt powder where ordinarily the crown would be clean with only tiny black spider lines coinciding with the lands and groves. I heard from more than one old-timer one way to check the efficacy of your crown (apart from the obvious groups) is to fire a few rounds and look at the pattern of carbon on the crown, is it exactly even?
A case in point is the Lilja M4 'Navy' .223 Wylde drop-in. With a can on the end it gets filthy extemely quickly, caking a layer of ceramic burnt powder where ordinarily the crown would be clean with only tiny black spider lines coinciding with the lands and groves. I heard from more than one old-timer one way to check the efficacy of your crown (apart from the obvious groups) is to fire a few rounds and look at the pattern of carbon on the crown, is it exactly even?
Comment