Discussion in 'Handloading and Reloading' started by Mr_Flintstone, Apr 13, 2021.
It just says max velocity. https://www.berrysmfg.com/product/bp-38-357-125gr-fp Click on Loading Tips. It’s not hard to push a 125 gr bullet to that velocity from a rifle. You can get close in a .38 Special revolver.
I guess the good news is they’re fast enough for a good close range vermin load in .38 or .357
But a .357, 125 gr bullet out of a rifle length barrel will probably exceed 1500 anyways.
I wouldn’t call them excellent but they are cheap. If they were as good as an jacketed bullet they would cost a lot more. Better than a jacketed bullet and they would be even more expensive.
I used to order them by the pallet and won a lot of matches with them but always knew they were not the best, just not the worst either.
Thanks. I used to use Rainier plated bullets, and I had to be careful with those as well. They were rated at about 1500 fps though. I guess I was just thinking of those when I bought these.
I've been looking at loads for these, and it looks like I can go to about 4 grains of Titegroup, Bullseye, or 231 or about 4.5 gr Unique and still be right at 1200 fps from a 20" barrel using .357 Magnum Brass. I'm going to start some chronograph tests today if the rain holds off.
I've run them with h110 in a Rossi 92 with no issues. I never did try them in a revolver.
I bought nearly 1k 158 gr. plated bullets off of a member here sometime back. I load them with Titegroup and HP-38/W231 for 50 yd. target shooting, out of my 77/357. I don't recall the amount of powder I use. But it works okay.
One thing to consider, if you haven't already. With the faster powders like Bullseye and W231, the bullet velocity may peak in the barrel and be slower at the muzzle.
That's an interesting thought. I'll have to look into that too.
ballistics by the inch will have that info: BBTI - Ballistics by the Inch :: .357 Mag Results
Grizzly/Cast Performance rates their hard cast 18BHN .358" gas checked bullets up to 3100fps. They are real consistent but not cheap. I use their 200gr. WFN in my .357Max Handi-Rifle. I load the same bullet in .35Rem for my Marlin 336T. I use 18gr. of IMR 4227 or 15gr. of Alliant 2400 in both. I'm getting better than 1500fps with no leading from either rifle. Good for wild pigs. Goes clean through, end to end, and rolls them like they got hit by a pickup truck. Kind of funny how the straight-walled .357Max and the bottle-necked .35Rem perform the same with the same bullet and powder. The Handi-Rifle is a 22" barrel; the Marlin barrel is 2" shorter.
A quick look, it seems 16" it about peak. And I would assume most, if not all of those are with magnum powders. My guess would be the velocity would peak sooner with faster powders.
https://www.wideners.com/smokeless-powder-guide Then I did some estimations, and Gordons Reloading Tool backed up the statement in the guide that when you decrease the load density of a powder in a cartridge, it extends the point of peak pressure and powder burnout point forward in the barrel, sometimes moving the burnout point after the bullet exits the barrel.
As an example, GRT estimates 4.2 gr Bullseye with a 125 gr plated bullet to have a muzzle velocity of around 1200 fps with a powder burnout point at 9.6" into the barrel. If I reduce the charge to 3.6 gr Bullseye, it estimates 1120 FPS with a powder burnout point just as the bullet leaves the barrel at 19.4". When I compare this to a medium charge for a 125 gr xtp @ 7.5 gr Bullseye, the burnout point is at 2.4"
Like I said above, I have no way of testing this, but it would seem that if the load was still burning powder, the bullet would still be accelerating; albeit at a lower rate. That makes me think that the maximum velocity wouldn't be reached until after all of the powder was burned, and that a lower charge would get me to 1200 fps without the worry of exceeding the maximum rated velocity of the bullet. Or, I could just be overthinking the situation.
I think this load is pretty good. I just used some old untrimmed brass, and I could tell they weren’t the same lengths, because some of them crimped heavier than the others. They were pretty darn accurate too, but I didn’t take a picture of the target. Maybe next time.
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