308kiwi

When I did this exact test the issue I saw was that as you start loading the rounds they start to tip down at the front as the taper comes into play, much like the 7.62 x 39 round, you need a curved mag to compensate for the tapered round. Loading 22-250 into both the 20 and 25 round Magpul 308 mags I got, (from memory), 10 to 12 rounds into the mag before the tip of the top projectile was pointing at the inside of the front of the mag, no way was it going to feed out of the mag let alone into the chamber so I took it no further. Best of luck with your 22-250 build cjuergs90, and like SS says, please keep us all in the loop as you go.

Heya SS, the guide is a little strip of sheet metal with a notch to accommodate the plastic nut on the drum. Seems to work OK, I couldn't tell ya how many loads it's tumbled over the 5 or 6 years that I've had it, one of my better investments, note the dehydrator further along the shelf, the BEST way to dry your brass after tumbling .

I've been procrastinating and deliberating over the diabolical mess in the reloading room downstairs, finally found some motivation over the holidays, built lots of new shelves, tidied up, relocated and re-homed all the crap that's been cluttering up the floor in empty ice cream tubs for the last few years...............OK, now I'll tell the truth, the wife built all the new shelves and tidied up, I spent a day and a half farting around deciding where everything would go. But it all came out well at the end of the day, it's now a pleasure to go in there...

I looked at the 22-250 as well before settling on 243 Win for a build, I have a Rem 788 in 22-250 so already load the round. The biggest, (potential), problem I saw was that the 22-250 case is quite tapered and does not sit well when stacked in a double column magazine that is designed to house/feed a much less tapered case, I could see this possibly causing feeding problems so binned the idea.

BCG velocity too slow? Bolt catch and/or mag follower not interacting properly or bolt catch seized? Maybe just getting enough gas through the gas block and tube to unlock but not imparting enough energy into the BCG to drive it fast enough to cycle fully to the rear and pick up the bolt catch, seems strange that the ejector is not flipping the case out, would suggest the extractor has a GOOD grip on the case and the ejector is sticky? and the BCG is just travelling too slow? I'd be looking for signs of some component binding/dragging and perhaps also looking for signs gas leakage somewhere in the gas system/BCG. Is you gas block steel or alloy?, I had an AR15 that started to cycle unreliably and it turned out the gas had eroded the alloy gas block away in between the barrel bore of the gas block and the gas tube bore, creating a leak. I assume you have shot it sans suppressor to see if it cycles in a 'std' configuration? There's my 2c's for what it's worth

Happy New Year from NZ

Hey guys, I know this is an 18 month old thread but what was the outcome of this petition being presented? Any progress at the State or Federal level on getting this stupidity removed from further restriction?

Sorry that should read......clearance for the bolt lugs between the breech face, (end of the barrel), and the front face of the barrel extension lugs.

DPMS pattern extension has a 1" major dia thread, 16 TPI Trunion length is easy enough to figure out, locate the bolt into the barrel extension, sit the back of the bolt lugs against the front of the barrel extension lugs, measure with a depth micrometer from the front face of the barrel extension to the front of the bolt, this measurement is going to be your clearance for the bolt lugs between the breech face, (end of the barrel) and your bolt. Make sure whoever cuts the thread relieves the thread at the shoulder on the barrel where the extension will lock up against, you will also need to machine the first couple of threads down to their minor dia to clear the end of the thread in the barrel extension.

Yeah there is a guy trying to peddle this stuff over here, he's not selling a lot, most reloaders are as tight as a nun's nasty to begin with, not too many I can imagine will willingly retool for no real advantage except that you can pick you empties up with a magnet, whoopee.

Both of my 308 Aero BCG's have 2 o-rings under the extractor, both work just fine, I live by the old "if it aint broke then leave it the F**K alone" motto otherwise you could be doing this...........

Cool, I was going to get me one of them but the shipping from the US was a killer, ended up buying a Lortone 12lb tumbler here from a local rock polishing supplier and have been using it for 5 or 6 years without issue. Gotta love nice shiny brass, does just as good a job on projectiles too, the wife even runs cutlery through it now and then, brings tarnished teaspoons up a treat

I know I'm preaching to the choir here but FFS, it just makes sense, suppressed firearms make for safer, ie less hearing damage, hunting/shooting for all involved including your best four legged friends, (for those who hunt with them), and as for range use, well F..K, like I said to Sketch, it's almost considered rude here to turn up to a range and shoot without suppression, and when you consider the proximity of some ranges to other facilities, be they residential or commercial or whatever, the net effect is less noise complaints, less aggravation to your neighbours, less cost to clubs having to not install expensive, and for most intents, useless sound baffling. Man I could go on and on, Who's making noises on your behalf over there????, whoever it is they need a F...in shake up, The NRA???, Who pays their wages???. Just as well I don't live in the USA, I'd be down these F...kers necks boots and all, F...in bureaucrats give me the screaming shits.

Suppressors have gotten a lot cheaper here over the last year or so, there are lots of manufacturers all competing, coupled with the manufacturers tooling up with CNC centres has upped the production rate and reduced the costs. I think the prices you guys pay will come down once/if your law makers see sense and stop being so F..ing juvenile.

I'd tend to agree with Robocop, the speed difference is more likely from the different twist rate than the difference in gas systems but not really any way to prove it I guess.

Posted a while ago my 243 upper build, finally got my crap together and got a suppressor for it, had a play this afternoon, most happy Suppressor is a DPT modular unit, you can add or remove the end baffle sections to suit your application, weighs 8 oz. is 8" long and 1.625" in dia, 4 inches is over barrel and the rest, (basically all the baffle sections) in front of the muzzle so it doesn't add too much to overall length. The over barrel section is sleeved so the gases in the rear section don't come into contact with the barrel. Made in New Zealand, cost me $350 NZ, ($240 US). Short video link at under the bottom pic, enjoy Damn I wish you I could send you guys these things. 243 AR suppressor.mp4

Hell yes, Vegemite on toast is mana from the gods

BBBMMUUUUFFFFFF, I just threw up a little bit............... damn that's just nasty.............WHY...............and how come the contents look NOTHING like the label.

We appreciate that very much, just got home to NZ last night, 36 hours after leaving LA, tired is an understatement. BUT, we had a fantastic time in the USA. saw heaps, did heaps, didn't crash the rental, (bonus), spent more than the budget, (inevitable). We have already been discussing our next trip to the USA

FWIW, dunno if you guys want to add this to the "gas port dia thread", AR 243, 20" barrel, Rifle gas system, gas port dia .095" Works a treat

Cheers. Yeah, not sure of the exact purpose of the 'slots', possibly for cooling of the gas tube, being in an enclosed space, not sure, but yeah like 98Z5V said, that's the way it came, the 'slots' are actually squared off at the top where they are designed to locate in the Aero forend, I mounted the upper in the lathe and radiused them to the same ID as the carbon tube, which is why they look shiny in the pic. As soon as we get home from holiday it's getting suppressed

Hey guys, our internal flights have been changed and we are simply going to run way short on time, result is we are not going to make it to Arizona, can't tell you how disappointed I am, was so very much looking forward to meeting you all. Seriously appreciate the invitation, it says a lot of you guys to invite a total stranger from the other side of the planet to an event in your backyard. Cheers

A 243 Win upper has been in the pipeline for a while, at last I've finally got all the bit's together. Aero M5E1 upper & bolt group, BAT Machine 308 barrel extension, Syrac adjustable gas block, Barrel is a 1:10 6mm that I salvaged from a re-barrel on an F class bolt rifle, guy I did the work for said "it's had 300 rounds through it, it's toast", OK I said, I'll get rid of it for you Turning and threading the tenon for the barrel extension... Chambering and headspacing.... Made the forend from some 56mm carbon fibre tube, this stuff is hard on cutters, 3 x 8mm carbide cutters later... Had to machine up a spacer to adapt the carbon tube to the upper... Time to load up some rounds and see what it'll do... 95gr RBTHP's that a friend here hand swages from Berger jackets Not so sure this barrel is "toast" just yet :-) Pretty happy with how it turned out..on the bench with it's (possibly now redundant) 308 upper beside it.

Chloroform.................Thankfully you guys are talking in jest??, well I hope so, cause otherwise it's a little scary Anyway, back on topic, fitted barrel back together and grouped it @100yds this morning, my 'hack' fluting job hasn't changed accuracy in any way, still shoots OK. Ammo was FNB 55gr FMJ mil surp that the NZ Army disposed of a few years ago, a few of us got down on it big time as it was ridiculously cheap and shoots reasonably consistent groups. The tape measure is graduated in cm in case you're thinking inches and saying to yourself, "my dog can shoot a tighter group than that Kiwi" (2.54cm = 1")

Decided to have a go at fluting one of my AR barrels, not for any particular reason but it's a process I've not tried before, came out pretty well, probably more cosmetic than practical but hey... 18" barrel, .936" dia gas block to muzzle, 1" from gas block to barrel extension, flutes are 5/16" wide and 1/8" deep, gave it all a media blast and then polish.