.330″ RBs in 8MM

Just for kicks and giggles, I did a little experimenting with .330″ round balls in 8MM. The balls were lubed with Black Magic and loaded ‘as cast’ to the ball equator.

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I charged the case with 2 grains of Bullseye and located it with a one inch square of 3/8″ loft Dacron.

I filled a box with old newspapers and stood the box up so the ball would go through the layers of paper. I fired the test round with an old sported 1941 Kale Mauser.

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The ball penetrated a little over 2 inches of paper. Below, you can see the equator band from engaging the riflings.

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In the next photo, you can see the spiral shaped deformations in the forward side of the ball from spinning into the paper.

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I’d have to run this load across a chrony to get the velocity, but I would imagine a .330″ round ball with enough energy to penetrate two inches of newspaper would certainly kill a squirrel at reasonable distances.

The muzzle report was about like a standard 22 short.

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About Jim

Retired from industrial construction and livin' the dream in the mountains of Virginia.
This entry was posted in Handloading, SUBSONIC. Bookmark the permalink.

2 Responses to .330″ RBs in 8MM

  1. hivelocity03@aol.com says:

    Jim- All good info in the Floyd Files. I’m casting the NOE 225-55gr-FP. It weighs out at 62 grains with ACWW, lubed and gas checked. Let me know, I’ll send you some. These won’t operate a bolt in an AR, but were superbly accurate when a friend shot them in his AR at 100 yards. Try 6.4grains of Unique, OAL is 2.182″. I ordered one of the Mossberg Predators in .223, should be in any day. I’ve got brass ready, cast bullets ready, now I need the dang rifle. Keep in touch, be safe, John Kirk in Columbia, SC (HiVelocity)

  2. Jim says:

    John, good to hear from you! And thanks for the vote of confidence on the site and articles.

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