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Posted: 2/4/2015 9:42:33 PM EDT
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I am looking at this pulldown powder. The seller say it is similar to current H50BMG
Has anyone used this powder? I am using h50bmg with a charge of 200 grs. Under 647 gr m33 ball bullets Will this same load be good with imr5010? |
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Quoted:
I am looking at this pulldown powder. The seller say it is similar to current H50BMG Has anyone used this powder? I am using h50bmg with a charge of 200 grs. Under 647 gr m33 ball bullets Will this same load be good with imr5010? Depends. I know that there is a powder burn rate chart out on the web that can compare the two different powders. I used to have the info but my HD crashed with that information recently. I know what my loads need to be and the COL. What you may want might be different. Need your barrel length too. Off of the top of my head, I think I was using 213 grains of powder but I can`t tell you what the COL needs to be. Working on it. ETA, Found it. 5.43" Max length. Speed was 2725 out of a 30" barrel. This load works in semi and single shot rifles. Work up your loads accordingly. The 50 cartridge is like a grenade in front of your face. Don`t take my word for it. |
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There is two main burn rates for Virgin H5010 with the latest being about 10% HOTTER than the first, then pull-down adds a whole new wrinkle to the plan.
All of it is hotter than H50BMG. With H50BMG I've used up to 245 grains with the 650 grain Lehigh 510-120 solid brass ball. With the 695 AP, I use 225 grains max of Early Virgin H5010 = I know, apples and oranges for requested data, but my experiences. I will be developing a load for 647 API soon using the Virgin H5010, expect to be in the 230-235 grain range with my older lot of powder. Do your research on powder levels. Don't accept data as gospel - not even mine. Verify against several sources. I've used loading's that would damage some guns, but got away with it due to un-published details. HAVE FUN, BE SAFE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
| I will never use or purchase another "pull down" powder. When I first started loading for my 50 I picked up 16 lbs of WC 860 and the velocities were all over the place. I even winnowed the dust out of it in front of a fan to try and make it useful. I still had over 200 FPS variation. I ended up burning the rest of it in my burn barrel. I don't mind surplus but pull down never again. |
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Quoted:
I will never use or purchase another "pull down" powder. When I first started loading for my 50 I picked up 16 lbs of WC 860 and the velocities were all over the place. I even winnowed the dust out of it in front of a fan to try and make it useful. I still had over 200 FPS variation. I ended up burning the rest of it in my burn barrel. I don't mind surplus but pull down never again. Hard to tell anymore, what is pulldown and what is virgin. I always ask but sometimes, the answers I get are vague. I can understand where you are coming from. I do know this much, any powder that I buy, I start low, and work up. I think that even the military ammo makers usually adjust their charges by the results that they are getting from the powder that they are supplied with. Caveat emptor? |
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