Big Bore Semi

Puma said:
Ruger .44 Mag semi auto :owned:
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Holy ####. Did you even READ his original post? Here: Let me quote and highlight the important bits for ya

bruce johnstone said:
I was wondering if anyone has built a semi big bore, 450 marlin, 50 AE or things close. I was thinking that it may be possible to build one on a BAR short action carbine, I would like something with more punch than my deerfield in 44 mag.Any ideas would be great.
tks, Bruce
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You know...the ruger deerfield? The 44 mag semi?


Him: "I want more thump than my ruger 44 mag"

You: "I know! Get a ruger 44 mag!"

#### me......"owned" indeed :rolleyes:
 
bruce johnstone said:
Thanks, I do like the idea of the 358 but 450 would be best. Looking for bush thumper,,, 458 is too much. I wish the bushmaster was available to hunt with. I may be able to get Doug at epps to do me up a short trak magnum rebarelled to 450 or something like it.
I agree, someone should make it it a semi for us bush bear and deer hunters.
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What about the H&K SLB 2000 in 9.3x62? I can't imagine deer and bear needing much more thump than a 286gr bullet at 2400 fps.
 
.458 bar

I think the smith's name was Mclennen or something like that ,he was in Ontairo but has moved to the US.I bought a used Bel. BAR in .300 WM for about 700.00 a BC syn.stock for 300.00 ?? and a SS 24" Magowen brl. 450.00
work was about 700.00. All in all a very nice rifle but way to heavy. The brl. at the muz.was .9" with not a lot of taper. We thought the weight would soak up some recoil witch it did,but like I said in my first post it should have had wheels.

stay safe
pounder
 
bruchawk said:
if i may ask why is the 450 bushmaster restricted
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Every 450 Bushmaster I've seen has been built on an AR platform. And we all know they are restricted in Canada regardless of calibre, sad to say!

Regarding the 9.3mm Merkels, I have a sneaky suspision they are a cheaper rip-off of the Voere rifle design.
Another option IF the OP is flush with cash, is the semi-auto rifle Voere 2185 in 9.3x62mm.
They are bloody expensive, but Canward Inc imports these rifles.

I notice no-one has stated the obvious, a Remington 750 Woodsmaster in .35 Whelen. This one would be really easy to handload for here, and most probably the least expensive choice.
Although not a true big bore in some circles, it certainly has more clobber than a .44 Magnum carbine.
 
-JD- said:
I always thought a semi-auto carbine chambered in 45-70 would be fun, use a reliable action, make it out of stainless and you'd have one heck of a tough animal stopper.
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Well, the Alexander Arms .50 Beowulf is pretty much that. (Not stainless, though.) 400 gr. bullet @ 1850 fps. AR-15 platform, though, so don't hold your breath on getting one.

:) Stuart
 
Actually, there are several 9.3x62 options. Already mentioned are the H&K SLB 2000, Merkel (I don't think Merkel makes a cheap anything - they have a great history and tradition of firearms manufacturing) and the Voere 2185. The other option, which I forgot to mention, is probably quite pricey, but certainly worthy, is the Sauer 303 in either the Classic or Classic XT (synthetic stock) guise. You can have either a 20" or 22" barrel, and it's magazine will hold 4 rounds of 9.3x62. The XT can even be had with a left-hand stock inlay. The butt-stock is easily detachable for compact travel capability.

You can download the brochure here:
http://sauer.de/cms/upload/downloads/SAUER_303-Broschuere_english.pdf
 
I remember in G+A magazine they did up a .458 on a BAR .Couldn't be taken to Africa because of SA bans.But it worked............Harold.......if you want big they do make a 20mm in a shoulder fired semi?
 
While it is not a semi, it should be "reasonably easy" to make a 450 Marlin on a Remington 760/7600 pump rifle platform. The barrels come off easily, something like a 870 shotgun. If you can find an old barrel from which to make a barrel stud, you screw the new barrel, 458 or maybe 50 to the stub and then work on the mag to get feeding. The BAR's and the BPR might be easier to feed but their barrels often require more work to get off and replace.
 
The only "fly in the oinkment" is that big bore cals. are usually associated with close range, possibly dangerous use, and the extra length of the semi action may not be welcome, and alot of folks don't have the confidence in a semi to feed and/or fire under all circumstances. Most African guides prefer a double for serious work and I'm sure you couldn't sell them on the autoloader for serious work. Most Euro-autoloaders are long rifles with short barrels because the action is so long, longer than boltguns. This isn't something new, look at the Ljungman!!
 
hiredgun said:
While it is not a semi, it should be "reasonably easy" to make a 450 Marlin on a Remington 760/7600 pump rifle platform. The barrels come off easily, something like a 870 shotgun. If you can find an old barrel from which to make a barrel stud, you screw the new barrel, 458 or maybe 50 to the stub and then work on the mag to get feeding. The BAR's and the BPR might be easier to feed but their barrels often require more work to get off and replace.
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The .458 American 2" looks very close and was around years before the Marlin.No reason a semi Rem /Browning couldn't be re barreled to 9.3x62?
 
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I had another idea - perhaps a BAR chambered in .338 Win Mag could be rebored and rechambered to .358 Norma Mag. Performance ought to be very similar to the 9.3x62, and I suspect that the relatively close case capacities between the .338 and .358 would mean gas port regulation would be simple too.
 
It took me a while to find the article about the big bore semi-auto. It is in the Handloader's Digest 12th edition (1990).

The author, Karl Bosselmann, converted a BAR in .300 Winchester Magnum to a wildcat .416 Taylor. The author says it is the ballistic equal of the .416 Rigby.

300 gr bullet at 2671 fps
400 gr bullet at 2356 fps

I did a Yahoo search and Mr. Bosselmann is a well published firearms writer.
 
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