Urastus wrote:Hello. I'm about to buy a new .22 rifle and scope and all the other gear that adds up. It's a fair bit of money. Anyway, reading on various rifles I came across some folk who had short .22 barrel life and the theory is that the ammo they use has ground up glass in the priming mix. The wear usually shows along the bottom of the bore. Eley is one manufacturer that does this: https://www.chuckhawks.com/quest_22_ammo.htm An alternative to ground glass as a frictionator (sheesh) is aluminium powder which is also a propellant https://www.bevfitchett.us/chemical-ana ... tions.html. Obviously with a nice new rifle I want to keep away from the glass stuff. Does anyone here have any knowledge of what brands use aluminium powder, or what brands use glass? Be aware if you search for aluminium in the links above use the spelling aluminum (the us spelling)
Urastus wrote:Hello. I'm about to buy a new .22 rifle and scope and all the other gear that adds up. It's a fair bit of money. Anyway, reading on various rifles I came across some folk who had short .22 barrel life and the theory is that the ammo they use has ground up glass in the priming mix. The wear usually shows along the bottom of the bore. Eley is one manufacturer that does this: https://www.chuckhawks.com/quest_22_ammo.htm An alternative to ground glass as a frictionator (sheesh) is aluminium powder which is also a propellant https://www.bevfitchett.us/chemical-ana ... tions.html. Obviously with a nice new rifle I want to keep away from the glass stuff. Does anyone here have any knowledge of what brands use aluminium powder, or what brands use glass? Be aware if you search for aluminium in the links above use the spelling aluminum (the us spelling)
tom604 wrote:i didn't know you could wear out a .22
Ten wrote:Many years ago I noticed a six o'clock ring showing up just forward of the chamber in my Hart barrelled Anschutz after about 50,000 rounds.
I queried Eley on this and they said the visible ring was due to the ground glass in the priming mix, and not to worry. They added that they had test barrels that had fired over 300,000 rounds!
No1_49er wrote:Aluminium "powder" is usually Aluminium Hydroxide (Alumina). There are various grades, some of which are rather coarse for use in smelting to produce aluminium. Fine (particulate) grades are used as the abrasive in some toothpastes.
Probably more abrasive than glass. Be careful what you wish for.
bloody oath they do... even thre eley stdknowsnothin wrote:Bottom line is.
Eley shoot good.
Oldbloke wrote:The hardness of Aluminium Hydroxide on the moh scale is 2.5. Glass is 5.5. It isn't linear so I'd guess glass is at least 5 times harder.
The glass it added to the primer mix to make it more sensitive to impact. This I guess would result in more reliable ignition.
Urastus wrote:Oldbloke wrote:The hardness of Aluminium Hydroxide on the moh scale is 2.5. Glass is 5.5. It isn't linear so I'd guess glass is at least 5 times harder.
The glass it added to the primer mix to make it more sensitive to impact. This I guess would result in more reliable ignition.
Yes, that's right. They call it a frictionator. Actually, I just read that eley has a patent on it (glass in the primer mix). Hopefully that means they're the only ones doing it.
Urastus wrote:I would be happy with 100,000 if it's still accurate that'd be awesome. Thankyou all