Why don’t I see them in, or hear about them, in SR Bench?
The newer Tubb DTAC bullets for LR are rebated. His reasoning tracks what Corbin and his relative have said for accuracy.
I would go for rebated boat tails even with no claimed accuracy advantage just for point forming punch longevity. A small bag of damaged 6mm and .22 boat tail point dies that came with a pile of bullet making stuff shows me ya gotta be careful!
We never did find any BT core seating dies. Unless the prior owner was making them BTs solely at the point forming stage…can that even be done???
Related question: why don’t I hear of anyone in bench rest buying Corbin bullet dies?
OldM1 -
Howdy !
Well, this perhaps is not exactly what you were asking about…
I have used a swaged lead polymer-capped .35” cal rebated BT for accuracy experiments in my
Marlin M-336XLR .35 Remington. I pulled the 195gr bullets from”Dead Center Duplex” .45 cal saboted
muzzleloader rounds.
When “ patched “ w/ one wrap of DYMO nylon label maker tape, they make loaded cartridge neck OD
too large to fit the XLR’s factory chamber. * My solution was to cut the neck completely off the case,
Leaving just enough for me to form a larger shoulder area on the case…giving me my wildcat “ .35 Remington Neckless “.
I single-load my “neckless “ rounds by first breech seating the bullet w/ a home-made breech seating tool
( made from a Torx wrench and a length of plastic drinking straw ).
Powder charges are held in the case by a small wad of tissue paper folded back upon itself.
I single load for all shots.
The modified case is given a nominal case mouth ID of .310”, which allows the .308” diameter upper end of the bullet’s
boat tail to self-guide into case as the lever is closed, and bolt advances the charged case into battery. I use a 7.65
Mauser FL die to form the additional shoulder area w/ .310” case mouth ID on the “ neckless “ case.
After firing, the same 7.65 Mauser die is used to tamp the slightly expanded case’ mouth back to .310” ID, to allow reloading and re-use of the case.
The rebated boat tail bullet feature provides powder combustion gas sealing, by interfacing w/ the flat surface of the case’ mouth. These two components are pressed together when the bolt is closed, by nature of the bullet being already
sufficiently seated into the rifling. * The rebated BT 195gr Dead Center bullet is long enough to reach into the rifling, making the whole case firing and pressure build up process possible.
The “.35 Remington Neckless “ is “ minute of deer “ accurate, in the form described.
It’d be fun just to try it out @ a “score” shoot IMHO, despite suspected challenges in things like speed of loading/shooting,
and gun handling on the bench.
With regards,
357Mag
