From the Firearms Blog
A neat little conversion widget for turning a SxS shotgun into a double rifle, and it can be converted back. Overall SxS can be had for pretty cheap by many manufacturers, but double-rifles are REALLY expensive. Good name-brand ones like Holland and Holland or Purdey can run from new luxury car, to new house prices. Some other makers have managed to get the double rifle into the $5,000+ category, but these prices are because BOTH barrels needs to be able to hit the same point of aim off of the single set of sights on the rib. This is simply done by adjusting and soldering the barrels together, which is time consuming and therefor expensive.
This little shim allows it to be user adjusted, and running off a cheaper SxS. So there, now you can get your big-game Africa on without having to pay a fortune!
Depends on the rifle cartridge. I wouldn’t want to do this sort of thing with any rifle cartridge that traditionally would be in a double rifle. . . I don’t think the shotgun action would take it very long.
But for someone who just wants to play “Bwana, Big White Hunter” with .357 Magnum inserts, fine.
I dunno, the recoil impulse of your high-brass buckshot and slugs are fairly close to the classic big-five cartridges. I certainly found my experience with a .460 Weatherby Magnum to be on par with high-brass 12 ga loads, and that’s from firearms of similar weight.
Still this is just personal feelings, I’m sure people with a more technical background would be able to quantify it better.
Pressure, and the time interval. The same force in a shorter interval may feel about the same, but it puts more stress on the gun, because peak forces are higher.
Shotguns are pretty pussycat loadings for modern cartridges, in terms of peak forces and pressure — they just have an awful lot of powder because they are pushing a lot of weight.
Hey, that is cool! Some one was using their noggin. Barrel regulation for the lay man.
Way back, I saw an interesting combination at a gun show.. German SXS 20 gauge shotgun, with 8x57mm barrel insert permanently installed in one barrel (think it was the left). Had a Redfield 2x scope w/ mount directly over that bore. The other barrel was original 20 gauge. It wasn’t THAT heavy, maybe 9 lbs (steel barrel sleeve(s) does add some weight)
Pretty sweet but I didn’t have the coin at the time to buy it. A real curiosity.