Because they use different bore sizes, and different amounts of shot, so the burning rate of the powder is different. Do you not realize why there are many shotshell powders?
Reloading two 410 shells from one 12 Ga shell.
- Thread starter jaroslav
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- Western Manitoba
Is probable that no powder is originally made as a "shotgun" powder or a "rifle" powder - is several examples where same canister powder is used in some shotgun loads and in some rifle loads. Lots of powders that are suitable for rifle are not suitable for shotgun - and do not say ALL, because some can work for both and some can not. Is also different requirements among .410, 28 gauge, 20 gauge, 16 gauge, 12 gauge, 10 gauge, etc. - differing shot weights used - I just bought some one ounce #6 lead shot 28 gauge ammo by Federal - that is not a "normal" weight of shot for a 28 gauge - so the powder used was likely "tweaked" for that application - to keep the peak pressure down to within spec and to get enough shot velocity.
In my 5th Edition Lyman Shotshell Reloading Handbook, Blue Dot powder is used with specific hulls, wads, and primers in both 2 3/4" 3/4 ounce lead field loads for 28 gauge and in steel shot 3" 12 gauge - maybe other powders used in both places - maybe same powder used in more gauges - but is also many, many loads shown with different powders used - each seem to even use a different amount, although I have not gone through all those loads shown to know that - just my impression. The idea is there is a maximum peak pressure that your shotgun was designed to hold - and various ammo for that gauge have to be below that pressure - if you wander off on your own, is very unlikely that you have actual pressure testing gear - so in effect, your shotgun becomes your test vehicle - when it lets go, your load has gone too far - that might be on your first shot. In the BPI pressure tested loads listings, I see some instances of pressure going up 5,000 psi just from changing brands of primer in the load - nothing else is changed - in a situation where maximum pressure might be 11,000 psi. So if you are using a nice comfortable 9,000 PSI load with brand A primers, and swap to brand B primers, you could be going way over the max pressure limit for that gauge.
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Well, thank you for your information.
Finally I got it, that small shotgun bore like 410 requires SLOW BURNING powder like for rifles.
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Big bore dinosaur
CGN frequent flyer
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- NORT OF COW.TOWN.EH
Correct
Follow the burn rate chart. Give you an idea of the difference of powder speed
Then use the reloading data for the 410 shot gun manual..
No pulling bullets and guessing the powder.. never a good idea
Unless you like eye patchs , and sticking a thumb in.it...hahaha
There in lies your problem.
Your not listening to rational thinking form educated members, yet your logic is flawed because you have not read one book on reloading.
Thanks for your participation though.
Rob
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SomebodyTookMyName
CGN Regular
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- Central Saskatchewan
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