Thread: .500" barrels

If you are boring and rifling barrels, how difficult would it be to rebore a factory rifle barrel to 33 or 35cal?

Sorry bill, I`m only drilling barrels from solid stock with the three gun drills I have, a .420"/.430", .444"/.457", .500"/.510". For that you would need a piloted reamer.

Originally Posted by homebrew.357

"Greenhills formula" Aww, think I know, baby food, gotcher, and now all the A R little bangers are being squashed your new projects will have to be big bangers. I mean one 500gr slug will do more damage than a burst A R .223 stuff.Maybe I should knock up a few 25ldr barrels, really get into the heavy stuff.

brew ya old bugger -can you give me specs for a barrel resembling a politicians areshole/brain. could you also direct me to specs for reloading -weight of faecal charge ,amount of gas generated ,and finally impact in terms of paperwork??
reality -nup no need to worry they wouldnt know it if it leapt up and bit em on their fat arses.

Originally Posted by homebrew.357

Sorry bill, I`m only drilling barrels from solid stock with the three gun drills I have, a .420"/.430", .444"/.457", .500"/.510". For that you would need a piloted reamer.

I was thinking the original would act like a pilot hole, hard case that a solid rod is easier.
or is it that you drill then center off your bore hole?

The barrel is rifled, so any drill will go bumping down it over the old rifling and probably stuff it up and a gun drill cuts only on one side . My take on it would be to make up an armours "D" bit, bore the breech end to just over bore size in a bit and make the bit to just fit in. Setup in lathe and with plenty of cutting oil slowly cut out all the rifling in one go. Then ream to required bore size and recut rifling. Speaking of recutting the rifling, I have just done that, so putting the money in here`s the 22" .510" bore Elephant gun barrel with six groves cut rifling at 1-24" twist .
, A .500" gun drill tip, cuts one side.
, 22"long , The new recut six grove rifling, bad pic.

So seeing I got the rifling wrong with the first one I made another one, this time I cut rifled it with seven groves and looks a lot better . Again 22" long and bore is .510" with a twist of 1-24", so I`ve got a spare one. .
, Looks a lot better with seven groves.