Aside from the bolt strength, feeding is the issue. The S&W headspaces on the rim. This means the chamber has to have a ring around it to support the rim, but small enough to still fall within the bolt face recess (the recess is deeper than the rim is thick). Plus, this ring has to have a section removed to allow clearance for the extractor to rotate. So you are now trying to feed a round into a chamber that has a sharp metal ring surrounding it and you are trying to do so with gaping hollow point stubby round bullets. Note that the normal AR chamber has a chamfer to help guide the round into the chamber if it is not perfectly heading that way already. Making the rimmed rounds feed is a BEAR, ask Tony, the 44 Mag uppers he built were finicky as all get go.Then there is the minor mag issue, the 50B and 458S will single stack nicely due to absence of a rim (or a rebated one if you insist). Having the rimmed 500 S&W stack will be a challenge, given the limitations and will require a dedicated mag. While 22LR is cheap to shoot and folks can be persuaded to buy lots of custom mags for that caliber, the market for 500S&W will just not support that type of investment.If someone REALLY wanted an upper in 500S&W, it COULD be done, but the cost would be outrageous and it would have to be someone's pet project. A smith would end up having to charge way too much for R&D time...Note on the 44 Mag upper from Tromix, you would think that with magazines available (from another platform) and a very well known and popular round, sales would have been outstanding. Even following an article in Gun World, all of SIX were sold. The .50AE far outsold it and after that arrived the .50B and .458S which vastly outsold the .50AE.
The revolver rim is a PITA to deal with in semi-auto's. IMO, just go for a .50 Beowulf and call it a day.
That's just crazy. Who would even think to shoehorn something into a gun that it was never designed to take? People who look at a nice new gun that's just fine the way it was designed and just start thinking of ways they can mess it up make me
I wonder if you could get some .500S&W brass and mill off the extra rim. Call it .500 S&W Auto, or "five hundred swaaa".Next project Jesse?
That actually sounds a lot easier than some of the projects that have been proposed to me lately. I don't think it would be too hard at all. You'd have to switch to a taper crimp and headspace on the case mouth.Stick it in an AR-10 and it might work
So you "mill off the extra rim" and what does the extractor grab onto?
The .500 S&W has a somewhat unconventional rim, it doesn't just go straight out like the older ones. Look at the picture here: http://www.shootingtimes.com/handgun_reviews/STmonster_1103A.jpg looks to me like it has plenty to grab on to after you mill it to more or less rimless.
.50 AE isn't nearly as powerful, though. Might as well do a .454 if you are doing that. And it is wider then the beowulf all around.
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