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post #1 of 15 (permalink) Old 12-07-2014, 09:55 PM Thread Starter
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Powder not burning?

Have had issues since switching from 777 to regular black powder. Used to shoot 777 and the tc sabots in my firestorm. Switched to 2fg regular powder and the horned Great Plains bullets.
Second time it happened today but the jag broke off because it got jammed when swabbing between shots.
Using 85 grains bp and notice the Great Plains bullets are a little loose. Can it be that either I am getting blow by on the bullets or the too much powder. Started with 75 grains last year but didn't shoot that great.
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post #2 of 15 (permalink) Old 12-07-2014, 10:02 PM
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Re: Powder not burning?

For me, the GPB uses less powder than a PRB in the same gun.

Try backing off say 10 gr. see if it improves, and fouling reduces.

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post #3 of 15 (permalink) Old 12-07-2014, 10:24 PM
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Re: Powder not burning?

Sounds like blowby.You need a tight fit to give good clean burn.
Might want to give that bore a good scrubbing with a aluminum rod,jag and 0000 steel wool with oil.I do it to every new to me muzzy.
After that pump soapy water (swirl that breech area) and warm rinse.

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post #4 of 15 (permalink) Old 12-08-2014, 01:17 PM Thread Starter
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Re: Powder not burning?

I was researching and saw some people use wonder wads or something similar. Looks like they go between the powder and bullet, correct?
Anyone ever use that kind of setup? Little worried about dropping the charge due to lower velocity and possibly the bullet not having enough energy to expand
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post #5 of 15 (permalink) Old 12-08-2014, 05:25 PM
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Re: Powder not burning?

Is the Hornady GP bullet a hollow based bullet? If so a wad may make things worse as some hollow base bullets need the gasses to expand the hollow base skirt to flare and contact the rifling. The Mini Ball works this was as was used in the US Springfield musket.

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post #6 of 15 (permalink) Old 12-08-2014, 06:48 PM
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Re: Powder not burning?

Both the GPB and PA Conical have a hollow base. And should expand as a gas seal when the blast hits it.

DipNRip, the GPB should be snug enough to get the rifling cut into it when you short start it. If it is loose then, it might not be a good round for that bore. If it moves or is loose after it is cut to the bore, then it can move unseat far enough during use that you can bulge a barrel if not noticed before shooting. An overbullet card or patch pushed on top of it might keep it in place on the powder. Or try a sticky lube. I know the wax or whatever on the GPB isn't, and had them unseat myself.

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post #7 of 15 (permalink) Old 12-08-2014, 07:14 PM Thread Starter
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Re: Powder not burning?

It is very tight when first loading but once it is started goes in real easy. Much easier than a sabot would so too me it seems loose.
I know the Great Plains bullets are suppose to expand to seal once fired but that doesn't make much sense since there is no way the bullet can expand to trap the powder gas power.
I'll try the wads and see if that works. If not may have to try something else. Not sure what else though. Don't really want to deal with the pain and tinkering of using a RB and patch.
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post #8 of 15 (permalink) Old 12-08-2014, 08:04 PM
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Re: Powder not burning?

Quote:
Originally Posted by dipNrip
It is very tight when first loading but once .................. I'll try the wads and see if that works. If not may have to try something else. Not sure what else though. Don't really want to deal with the pain and tinkering of using a RB and patch.
You're doing a lot of tinkering to avoid tinkering with something that may not require as much tinkering.
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post #9 of 15 (permalink) Old 12-08-2014, 08:15 PM
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Re: Powder not burning?

Just don`t put the wad under the GPB, that definitely won`t work. I hope you get it worked out.

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post #10 of 15 (permalink) Old 12-08-2014, 09:08 PM
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Re: Powder not burning?

PRB's really are quite simple. all you need is a loading block made from a piece of wood. it will hold your lubed patch with the ball. hang around your neck and you are good to go. probably faster than digging out a bullet and getting it started.
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