.22LR Sub-Caliber Barrel Insert

[Diver6106]

I also noticed that WLyon's link above uses a spring in the grip for his 22LR Luger, like their bigger brothers. But the spring must be very substantially reduced to handle the lighter load. In the Erma 22LR kits, there are two springs in the toggle and it is disconnected from the grip spring. I find these variations interesting and think WLyon's design is most interesting. As an additional note, the Erma bolt also contains a spring with pin buffer in the back part of the toggle assembly. This acts in a hard recoil when the toggle is completely jacked up, as the toggle assembly does not have a protrusion like a standard toggle.

[sheepherder]

Originally Posted by Diver6106

In the Erma 22LR kits, there are two springs in the toggle and it is disconnected from the grip spring.

There was nothing about disconnecting the mainspring ["grip spring"] in the Erma instruction sheet. I don't think that would work either, as the cannon assembly has to move rearward ~1/4" to align the magazine for feeding and ejecting.

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In any event, my sub-caliber insert is finished. Pics below. I had to wait for the 11/32" x 32tpi NEF tap for the insert nut. I made the nut out of brass just for S&G, and *tried* to knurl it at 14lpi but it didn't turn out too good...

I'll try it out ASAP but as usual I've finished something on a weekend and the club is jumping with shooters. Fall small-bore leagues starting up, center-fire league still going strong, and the occasional cowboy all lining up to shoot.

I'll try next week during the day.