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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
1/2x28 30cal side port muzzle brake
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<blockquote data-quote="BallisticsGuy" data-source="post: 2535262" data-attributes="member: 96226"><p>If you have a muzzle on a .30cal with 1/2" threads have your muzzle gauged after firing a box of shells and I'll bet you an unpleasant surprise. The bore as deep as the threading will be looser than the bore deeper in the barrel than the threads. A number of people have demonstrated that even 5/8x24 is a bit on the small side. From .243 to .338 I much prefer 3/4x24. Added meat at the muzzle helps keep it from belling out. I had the muzzle on a few barrels I was running 5/8x24 brakes on gauged. All came out looser under the threads than deeper than the threads even with .243cal. About a year later I found the video below and decided right there and then to go 3/4x24 on all future barrels of .24cal to .338cal. On my .223's I now do 5/8x24.</p><p></p><p>I suspect the effect is more pronounced on stainless barrels than on chrome-moly barrels. I run almost all barrels in stainless anymore. </p><p></p><p>Yes, thousands of people did smaller threads for decades. We also used to think rotary dial telephones were a pretty useful thing.</p><p></p><p>[MEDIA=youtube]CUm_YXzJJOU[/MEDIA]</p></blockquote><p></p>
[QUOTE="BallisticsGuy, post: 2535262, member: 96226"] If you have a muzzle on a .30cal with 1/2" threads have your muzzle gauged after firing a box of shells and I'll bet you an unpleasant surprise. The bore as deep as the threading will be looser than the bore deeper in the barrel than the threads. A number of people have demonstrated that even 5/8x24 is a bit on the small side. From .243 to .338 I much prefer 3/4x24. Added meat at the muzzle helps keep it from belling out. I had the muzzle on a few barrels I was running 5/8x24 brakes on gauged. All came out looser under the threads than deeper than the threads even with .243cal. About a year later I found the video below and decided right there and then to go 3/4x24 on all future barrels of .24cal to .338cal. On my .223's I now do 5/8x24. I suspect the effect is more pronounced on stainless barrels than on chrome-moly barrels. I run almost all barrels in stainless anymore. Yes, thousands of people did smaller threads for decades. We also used to think rotary dial telephones were a pretty useful thing. [MEDIA=youtube]CUm_YXzJJOU[/MEDIA] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
1/2x28 30cal side port muzzle brake
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