bubbas4570 Posted February 7, 2021 Report Share Posted February 7, 2021 If I have an A2 flash hider that will pass a 25/64 drill bit, will this be enough for a .358 Win barrel? If not, what will be the correct size to allow the flash hider to NOT self destruct upon firing? I figured there will be someone here who knows way more than I do about these tolerance/clearance measurements. Quote Link to comment Share on other sites More sharing options...
Matt.Cross Posted February 7, 2021 Report Share Posted February 7, 2021 That's roughly .030" clearance, or more than .015" per side of clearance if the actual bullet diameter is in fact .358". Quote Link to comment Share on other sites More sharing options...
bubbas4570 Posted February 7, 2021 Author Report Share Posted February 7, 2021 Yup, that is it for tolerance.....is this enough for me NOT to speedily remove it from the muzzle (assuming it is concentric and such)? I am asking the simple question of "is this enough"? Quote Link to comment Share on other sites More sharing options...
98Z5V Posted February 8, 2021 Report Share Posted February 8, 2021 You'll be fine, brother. I've drilled them less than that to pass weird calibers. I drilled my .308 Win brake to clear my .338 Fed, with less than 0.030" clearance, and it's never been a problem. And the .358 Win is a .358" projectile. Quote Link to comment Share on other sites More sharing options...
bubbas4570 Posted February 8, 2021 Author Report Share Posted February 8, 2021 Thanks 98. My question was predicated on this: the flashhider was originally on a 308AR. I was wondering about how much passing measurement needed due to the large amount with the .308 bore. I knew a .358 bullet would pass by hand with a fair amount of "rattle room", but I wanted to ensure safe passage without damage. Quote Link to comment Share on other sites More sharing options...
mrmackc Posted February 9, 2021 Report Share Posted February 9, 2021 On 2/8/2021 at 12:34 PM, bubbas4570 said: Thanks 98. My question was predicated on this: the flashhider was originally on a 308AR. I was wondering about how much passing measurement needed due to the large amount with the .308 bore. I knew a .358 bullet would pass by hand with a fair amount of "rattle room", but I wanted to ensure safe passage without damage. I figure with that kind of clearance the bullet will fly thru so fast the flashhider won't have time to fornicate up! Quote Link to comment Share on other sites More sharing options...
bubbas4570 Posted February 10, 2021 Author Report Share Posted February 10, 2021 I had thought the clearance was excessive for the 308, but with that much on the factory part, I wasn't sure what was needed for the .358 to pass. I figured it was going to work, as silencers work in this area of clearance measurements (and even tighter I assumed).....but wanted to ask people who know much more than I. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted February 10, 2021 Report Share Posted February 10, 2021 I bought an expensive 5.56 Match A2 flash suppressor from a great company a few years ago, to put on the Woody - which is a complete 5.56 National Match-built gun - just with wood furniture. When that expensive NM A2 flash suppressor came in, I was all about measuring it, spec'ing it, finding out what made it "National Match..." The bore size in it, compared to a regular old A2, was another 0.020" bigger. I dropped the bucks, and I could have done that with a reamer, myself. But, I didn't know that, THEN... You'll be fine, brother - clear the projectile, and just run with scissors... Quote Link to comment Share on other sites More sharing options...
DNP Posted February 11, 2021 Report Share Posted February 11, 2021 Just make sure it’s on there snug...or it may go farther than the bullet does. Right @MikedaddyH? Quote Link to comment Share on other sites More sharing options...
MikedaddyH Posted February 12, 2021 Report Share Posted February 12, 2021 3 hours ago, DNP said: Just make sure it’s on there snug...or it may go farther than the bullet does. Right @MikedaddyH? Loctite is too easy, we need a challenge ! Quote Link to comment Share on other sites More sharing options...
Rsquared Posted February 12, 2021 Report Share Posted February 12, 2021 3 hours ago, DNP said: Just make sure it’s on there snug...or it may go farther than the bullet does. Right @MikedaddyH? Yeah, if they're not on there tight, they'll blow right off the end of the barrel. I wonder who would shoot something like that? Quote Link to comment Share on other sites More sharing options...
mrmackc Posted February 12, 2021 Report Share Posted February 12, 2021 (edited) 1 hour ago, MikedaddyH said: Loctite is too easy, we need a challenge ! I got one of these for my 182 series Mini 14 . It has a slot for the original front sight and a longer roll pin, and i drilled and tapped he bottom below the slot for two 6-32 set screws. I would do the set screws for a LR308 aftermarket device also., maybe dimple the barrel a dab before using a High temp adhesive product . the cleaning rod and a 0.224 drill bit slides in and out with some wiggle room. Edited February 12, 2021 by mrmackc Quote Link to comment Share on other sites More sharing options...
bubbas4570 Posted February 12, 2021 Author Report Share Posted February 12, 2021 Hell those old Mini brakes could damn near clear a 45 caliber something or other...... Quote Link to comment Share on other sites More sharing options...
mrmackc Posted February 14, 2021 Report Share Posted February 14, 2021 (edited) On 2/11/2021 at 11:44 PM, bubbas4570 said: Hell those old Mini brakes could damn near clear a 45 caliber something or other...... Well not this one the OD of the barrel at the muzzle is just a bit over.5. the flash holder has a reduced opening at the muzzle. Edited February 14, 2021 by mrmackc Quote Link to comment Share on other sites More sharing options...
bubbas4570 Posted February 17, 2021 Author Report Share Posted February 17, 2021 Ah, they must have changed their design flashhider then, the old ones were a slip fit over the barrel and basically a straight tube all the way through..... And I was almost joking about what it passed.....I just know the hole was pretty big, considering how brakes are "fitted" to the bore sizes better now days... Quote Link to comment Share on other sites More sharing options...
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