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Thread: Oven Heat Treat Up to Jacketed Velocities?

  1. #1
    Boolit Buddy
    Join Date
    Dec 2021
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    166

    Oven Heat Treat Up to Jacketed Velocities?

    Over in the Coatings and Alternatives subforum, I found this interesting discussion about pushing PC'ed (and double-PC'ed) boolits to maximum velocities. The thread was named Can you just PC and (almost) forget about BHN?

    Quote Originally Posted by Dragonheart View Post
    The professor calculated a .003" thermoset polymer build out would resist the torque spin up of 50k psi chamber pressure of a 30/06 i inquired about.

    I single PC my handgun bullets, but if I am loading full power loads I do a partial cure, double PC. I have found PC to be stable at in full power loads 30/06 loads as well as 3500+ fps in a 22-250. I personally find it amazing we can create a polymer bullet jacket in the first place and second that it works so well.

    This is really interesting to me and I want to ask a related question.

    The idea that we can take a copperless bullet and coat it to maximum pressures and velocities over 3000 fps is amazing. I've noticed that over on LASC, they make the same claim for oven heat-treated alloy—without PC. I've searched around castboolits the past couple days and read probably 15 threads, but I haven't been able to find one that squarely addresses this claim. So, if anybody is interested, this is on the Cast Bullets Notes page at LASC. Scroll down about halfway and there's a table, Approximate "Maximum" Chamber Pressure for Lead Alloys (PSI). On this table the highest pressure category is Oven Heat Treated Wheelweights, and the claim is

    "55,000 [psi] - Jacketed velocities in handguns and rifles with quality bore and balanced load." No mention of a gas check, I might add. The site claims WW (of appropriate antimony content) can be heat treated to over 30 BHN.

    Is this realistic? "Jacketed velocities," let's just say 2750 fps, to be reasonable. With no PC and no GC. I solicit your thoughts.

  2. #2
    Boolit Buddy 414gates's Avatar
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    Jan 2017
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    It's one thing to get a lead bullet to 2750 fps, and another to get it to that velocilty and still hit what you're aiming at.

    Whenever you hear of such a feat, ask to see the 100 yard 5 shot group first, then go ahead and duplicate the load for yourself.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check