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  #41  
Old 10-31-2014, 01:05 AM
montdoug montdoug is offline
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Default Yo Kevin.

My reasoning for not using it in .17's and .20's doesn't run that deep Kevin . Neither do I even have proof of my concerns so I'd never try to persuade someone to follow my lead. My thinking for what it's worth is as simple as this.
In the .22 Hornet and .22 K-Hornet I have personally seen large velocity swings from one shot to the next for no apparent reason . That to me indicates pressure swings. In the small cases with their limited range a 100FPS spread at 250 yards doesn't amount to enough to cause a miss on a rodent. If my load for the .22 Hornet that's sighted in at 200 yards and has a 3.37 drop at 250 yrds (which it does) and gains 100FPS in a pressure swing it's drop at 250 is only 3.12inches or .25 inch less, "who cares ?"
Also if I was close to max pressure with a load that swung 100FPS the .22 caliber hole offers a much bigger escape valve for an upward pressure spike than say a .17 caliber hole might. In a bigger case like say a .221 Fireball there is IMO enough more powder in the case that the pressure swings could be proportionately larger and possibly cause problems, a lot of guys say no but as well as 1680 works in my .221 I don't choose to find out.
There ya go Amigo not very deep and not very scientific but it makes enough sense to me that I'm sticking to it .
That testing ya mentioned sounds like something a guy with your expertise should tackle .
Hope all is well in your world compadre.
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  #42  
Old 10-31-2014, 07:04 PM
brians356 brians356 is offline
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Quote:
Originally Posted by Chuck Miller View Post
I think it's the high nitro content. I know if I drop it in a case and poor it right back out, the inside is coated with it.
Coated with "nitro"? What does nitro look like?
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  #43  
Old 11-01-2014, 05:30 PM
Daryl Daryl is offline
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Quote:
Originally Posted by brians356 View Post
Coated with "nitro"? What does nitro look like?
Coated with powder granules is what he means.

I've not had that problem, but perhaps relative humidity has a bearing on this.
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  #44  
Old 11-01-2014, 07:31 PM
Chickenthief Chickenthief is offline
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Quote:
Originally Posted by brians356 View Post
Coated with "nitro"? What does nitro look like?
Nitroglycerine is an oily slughtly yellow'ish liquid.



Used to boost the energy content of powder sometimes even nitroguanidine is used (trible base powder, mostly for artillery).
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  #45  
Old 11-01-2014, 08:30 PM
brians356 brians356 is offline
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That's scary! But the "nitro" in this sense is more akin to "nitrocellulose" aka "gun cotton".

I figured he might be referring to graphite reside, which some powders leave a lot of behind.
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