Discussion in 'Handloading and Reloading' started by CoalCrackerAl, Jun 26, 2022.
Those are what I describe as pinwheels but don't have pictures.... I've never had it happen to me...
I agree. 2400 is for 1800-2200fps. Rifle powder for anything faster.
Well yippee-kai-yea! Now we're talkin'!
That little 120gr. plated ought to run like a laser beam out of your... um... don't recall you saying what types of .30-06's this was going through...
Anyways, they ought to run nice and fast without a lot of pressure for paper-punching. Lyman's Cast has load data.
I'm not familiar with the 770 - a little new for me - but I have a 760 in .300Savage and have had at least one in every chambering from .243Win to .35Whelen. It's one of my favorites of the old-breed Remingtons. My remaining Remingtons in .30cal are a 721 .30-06, a Model 30S in .30-06 and the 760 in .300Savage. I also have a 788 in .222Rem, a 600 in .35Rem and a Sportsman 81 in .35Rem. That 120gr. plated sounds like a recipe for a whole lotta fun! I might have to try some when I run out of 130gr. FRN Hi-Tek Quality-Cast .310"s.
The radial “pinwheel spray” is a bullet coming apart. If all of yours are doing that, they are all coming apart.
A “grease ring” left, even by an FMJ, is NOT an indicator they are coming apart.
This would be a normal bullet hole, for example.
The next pic is a plated 9mm FMJ fired into cardboard at a distance of 1 foot.
These are both factory ammo. I repeated this test with 40S&W reloads and have the same results. The plated bullets ALL leave a grey residue in that circular pattern. The bullets are not 'coming apart'.
If the plating was coming off, or the bullet was flying apart... common sense says it would punch a hole in the paper.
The person posting those 'pinwheel' pictures stated it was done as close to the muzzle as possible to not damage the paper.
Bullets rotate VERY fast. What is likely being seen, is a very light dusting of lube or something. Not sure what else would print on the paper but not tear it. Some leftover oil from cleaning the barrel? Some left over cast bullet lube in the barrel? A little leftover barrel fouling getting dragged along for the ride? I can't see the pinwheels being caused by plating failure, or it would have torn the paper.
The grey residue is not any of these things because it NEVER happens with jacketed bullets that I have fired at close range, only plated. I fired the shots with the same gun consecutively on the same day without any cleaning. Best I can figure is a little of the plating is scraping off resulting in small fragments of lead being removed by the rifling and exiting the barrel. Isn't puncturing the cardboard because the mass is so small. That's my theory anyway.
I have not tried this with non-plated lead bullets or synthetic coated bullets.
First, a bit of pedantic semantics. FMJ to me means a copper jacket (not plated) with exposed base. If I understand correctly this was shot with a plated bullet which is more of a total metal jacket (covered base), except to be clear the plating not having the thickness of a real copper jacket.
It looks to me like it came apart? Not only does the deposit look metallic, but are those small penetrations around the point of impact potentially fragments?
Well, come on over and I can demonstrate it for you. I can even show you how gain twist barrels like the Schuemann AET barrels have a greater propensity to destroy the plating and cause the pinwheels than traditional rifling.
This isn’t something I discovered, it’s pretty common knowledge to those that play gun games using them.
Yup. That's the reason I have always - and told other people the same - loaded copper-plated lead using the same data as the lead that's underneath the plating. Hard core, hard lead data. Soft core, soft lead data. The plating - like paint, enamel, plastic, wax or polystyrene - is just a lubricant laid on top of the lead. It's designed to mitigate friction, not the effects of inertia or centrifugal forces.
I tried a few loads using 110g jacked 30 cal (Hornady V Max if I recall). Over 3,000 fps I was getting bullets blowing up at ~50 yards.
This was a 1:10 twist .30-06. Varmint bullets have a thin jacket but not as thin as plated.
I would not be surprised to hear when you get to 100 yards that you’re having trouble matching up the rounds fired with the holes in your target
Please let us know
The volume and size of the ejecta says that's some kind of lube not a hole in the jacket. If you look at the original pinwheels they are 1-1.5 times caliber..... your example far excess anything I've ever seen.
There isn't a hole in the jacket because there isn't a jacket, this only happens with plated bullets!
I suspect most people have never fired plated bullets at a target less than 1 foot away. I hadn't in 35 years of shooting. Why would you? I ask that before you poo-poo this, shoot a plated bullet at a paper target from 6-12 inches and see that you don't see the same thing. I had similar results with 3 brands (I did this last year and don't remember the brands) of factory loaded 9mm (with plated bullets) and with my own 40S&W reloads.
I'm saying it's not lead... it's something else like lube.
But not plating?
I've loaded plated bullets (180gr) in 10mm and was amazed to see the pin wheels as have been pictured (not the wild one) over a healthy dose of longshot. I haven't loaded more. Plated were interesting for a short moment of the pandemic where they were all that was around. Easy to compromise (penetrate and show the lead core) the plating too with just a bit too much crimp. Never shot those. Accuracy regardless was poor too vs actual J-HP.
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