Using Fort Scott TUI bullets in the 5.7 Rock should make a good combination for self defense. I am hoping that Fort Scott offers loaded ammo for the 5.7x28. - Richard
Well google Ft. Scott and you can buy some…expensive though…I’d
suggest a AAC V-Max as your base.
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As of right now, Fort Scott does not offer loaded 5.7 ammunition. They do sell their 40gr. .22 cal. TUI bullets but they do not have load data for them in 5.7x28 (I asked).
I bought said bullets and loaded a 3-rung ladder load series using the 40gr. V-Max as a base to start from because the 40gr. V-Max is closest in bullet OAL to the Ft. Scott. While I think that the max load on the V-Max is probably also the max load for the substituted Ft. Scott., I backed it off by 0.2gr. for my max load, at 6.6gr. of No 7. I extended the COAL from 1.58" to 1.585" and I probably could have gone to 1.59" based on some other published data that I’ve seen.
The TUI has unique downrange properties compared to other bullets in published hand-loads such as the V-Max and Sierra Hornet.
Of course, this is all a custom load, not a published load. I don’t recommend anyone try this data. You’ll blow up not just your gun but the entire universe and cause the mass extinction of all life in this dimension and timeline.
Peace favor your sword,
Kirk
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Did you get any velocity readings ?
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The average velocity for the 6.2 grain loads was 1705. Average velocity for the 6.4 grain was 1770. Average velocity for the 6.6 grain loads was 1851 with a extreme top of 1994. This makes a rough average of 70 fps gain for each 0.2 gr. increase.
All powder was measured with a calibrated, and check-weight verified, balance beam scale. COAL was set to 1.585 but sometimes measured 1.587 (I would feel comfortable going up to 1.59). I used CCI Small Rifle primers.
When I start doing anything more than batches of 5 rounds, I’ll probably use my powder dispenser instead of individually weighing each. 50 rounds of hand weighing gets pretty tedious. Should be safe to set the powder drop and run a check charge every 10 or 20. But No. 7 is a really fine powder. It leaks out of my dispenser with every drop. I had to put a bowl under my dispenser to catch the leakage last time I did that (loading the V-Max).
Peace favor your sword,
Kirk
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About the same experience I have. I think I’m at about 6.6 gr or thereabouts with my 40gr TUI. Essentially this is going to wound just like T6B or Black Dragon Fang, which is IMO ideal for this caliber and velocity target. I’m going to guess it will poke soft armor too.
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I think 6.6 is the max for me. Might be able to go to 6.8 but I don’t want to. 6.6 showed consistent cratering of the primers. I’m not too terribly worried because the cratering is pretty much identical to cratering I see in factory loads and I know that 5.7 has a reputation for cratering primers in safe loads. The column on the left are the reloads and the column on the right are factory new loads. Same cratering pattern.
And you are quite right. As far as penetrating armor, you are 100% correct. This load is some powerful medicine against 3A soft armor.
Brand new 3A soft armor from BulletProofEveryone on top of about 4.5"-5" of stiff modeling clay.
6.4 gr. of No 7. Entry and exit:
6.6 gr. No 7. Entry and Exit:
Peace favor your sword,
Kirk
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Was the clay in front of or behind the armor?
Primers are normal for 5.7 handguns. Your primers are still round on the outer edge.
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@lklawson I’m loving everything you’ve been posting!
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The clay was behind the armor to show backface deformation. It’s uncalibrated clay so it wouldn’t be comparable to a laboratory test but it will give a general idea. I have some pics of 9 mm hollow point I fired into the same panel. It created about 2 in of backface deformation. Pics of the impact, the back of the panel showing no exit, and the clay showing 2" backface deformation.
Peace favor your sword (mobile)
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That’s gonna leave a Mark…
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