![]() (Not tinkering with rimfire modification would of course be even less risky.) Pulling the powder charge and reducing it (or replacing it with a known powder) would have been a less risky option. Well, I chose to pair a 60gr bullet (even though I hoped to go heavier in the future) with the full existing powder charge. But on the pressure increasing side, we're adding engraving forces not present in the shot load, plus the added projectile mass - there's no guarantee that pressures won't wind up high above the SAAMI maximum. Additionally, even a 70gr bullet takes up less space than 52gr of shot, so by seating it to standard length we're increasing the internal space, which should reduce the pressure. From that low performance, I expected it to be a rather low-pressure load to start with (but keep in mind it's certainly possible to have a high-pressure load with that velocity, and I had no guarantee CCI's wasn't such), and increasing the bullet weight to 60 or 70gr is a lower percentage increase than in, say, a 45gr. The CCI ratshot load is listed as 52gr of shot at 1000fps. (I did this with an arbor press and a simple conical mandrel If I make a better mandrel with a pilot to shove the plastic ahead, I can save a step with the simple one I made, I was concerned about plastic bits wedging between the taper of the mandrel and the case.) Once the crimp is gone, that ring of blue plastic slides right out, and the cartridge is ready for a bullet.Īt this point, to decide what I was gonna shove in there, I had to do some serious thinking about pressure, so here's what I thought: This gives room to expand the case mouth - just enough to remove the crimp. Turns out, the best thing is to break off and discard the part outside the case, then the rest will easily push down to the overpowder wad. After cleaning that up, I was left with a WMR case, primed and charged (with an overpowder wad keeping the propellant in place) - and I could hardly let that go to waste.įirst I had to figure out how to remove the remains of that blue shot capsule. One of the little boxes inside rattled different than the rest I opened that one first and as I suspected found one of the little capsules broken, and 52 grains of #12 shot rattling around in the box. It started when I bought a 200-round box of CCI ratshot. Will you get gas and brass shrapnel in your hand? Your face? If you're tempted to try this, think about how your gun will handle a rim blowout, as I think that's the most likely negative outcome. ![]() I certainly am not telling anyone this will work with their ammo and in their gun - all I can do is relate what I've done, and tell you it worked fine with my ammo and my gun. ![]() ![]() This week I finally did something about it. 22 WMR revolver with a 1:9 twist barrel (long story), so I've been looking for and thinking about heavy loads for some time I'd like to at least match SSS, if not beat it. 22LR, and worse than Aguila's 60-grain SSS. There's a lot of talk about "wouldn't it be nice", and lately there's the 45-grain stuff from Winchester Australia, finally being introduced here, though it's still exactly equivalent to 45-grain subsonic. I've seen a number of discussions on RFC about subsonic 22 WMR rounds.
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