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Posted: 4/20/2014 7:38:10 AM EDT
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I am aware that plated bullet manufacturers all state to stay no higher than mid-FMJ or upper end LRN powder charge. I have also noticed that some like
Hodgdon(700X) and Alliant(Bullseye) to name just two that are in front of me right now that the suggested max. charge for TMJ/LRN is very near or in one case a hair over the max. charge suggested for FMJ. I am not going to tempt fate just an oddity I have noticed. I am talking .40 and .45acp as my primary shooters. Forgot to form a question. what happens to the bullet or barrel in these cases? |
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Nothing happens to the barrel or bullet until you exceed safe pressures. From my chrono data there is usually 0.2 gr less powder for LRN to achieve the same velocity as PRN bullets. This reinforces working up a load since the construction of the bullets effects the pressure.
Is the velocities similar also similar in the load data your looking at? |
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I am not able to use a chrono , I am just going off of numbers from mostly powder producer's site . I stated just an anomaly in the printed data I've noticed.
Maybe simply wondering if anyone is aware of the same? EDIT: So why is plated data allegedly restricted by mid-FMJ if your not exceeding suggested max. for your bullet of choice? Once again just curious I am by no means trying to push any envelope. !! |
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I recently talked to the 3 major plated bullet manufactures' tech reps (Berrys, Rainier, and X-Treme) about velocity recommendations and while some were more close mouthed than others, the three agreed that they each have many, many users who report no issues at all shooting their plated bullets at velocities considerably higher than they recommend (I'm one of them). They stated that their recommended limits of between 1,200-1,500fps are taking into account the varied abilities and equipment current handloaders utilized when producing ammo using their bullets. |
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Quoted:
I am not able to use a chrono , I am just going off of numbers from mostly powder producer's site . I stated just an anomaly in the printed data I've noticed. Maybe simply wondering if anyone is aware of the same? EDIT: So why is plated data allegedly restricted by mid-FMJ if your not exceeding suggested max. for your bullet of choice? Once again just curious I am by no means trying to push any envelope. !! I believe the issue is more to do with the bullet (more specifically the plating) holding together at higher velocities. If it is pushed hard enough that there is a tear in the plating that comes apart as it leaves the barrel it will cause major stability and accuracy issues. |
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Personally, I run them at FMJ velocities in .380 ACP (100 gr RN), 9mm Para (124 g RN) and .45 ACP (185 gr HBRN) and I have not noted any issues. If anything, I've noted I can push them a little harder than a thicker jacketed FMJ before pressure becomes an issue.
The plating is a lot thinner than a traditional jacket, but if you don't roll crimp (and none of the above should be roll crimped as they head space on the mouth) the jacket remains undamaged. Even if it is damaged on firing, what you're talking about is the rifling potentially cutting through the plating but it's still bonded to the core. And unlike an FMJ, the base of the bullet is also plated and it seems to fare better than an exposed core with some powders. *But* you need to work up your own loads in your own pistols and pay attention to any signs of excess pressure. |
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Based on the other recommendations you get from plated bullets, I would think the real issue is people over-crimping and running at too high a velocity. Basically, in a perfect world when you don't over-crimp (and thus not destroy the plating), you can probably run at high velocity and be ok. But since they seem to imply the plating is not strong enough to take the crimp, they want you to be conservative with your velocity.
At least that's how I read between the lines... |
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