type 99

[todd]

i got my redfield 102 rear sight on, thank you Mr. Graff!!!!! i also cleaned the rifle, including the bore. whoever had it before was a Clean Freak. using shooter's choice mc-7, i let the bore soak overnite. the next morning, i did a nylon brush thru the bore. then i patched the bore and it came out clean as whistle. now being a cynic, i swabbed some sweets into the bore and i let wait for about 1/2 hour. i nylon brushed and swabbed it out and found nuthin. i went from cynical to suspicious. so i did a round of gunslicks foaming bore cleaner. i waited about a hour and did the brush/patches and found nothing!!! then i remembered the chrome lining , i g96 gun treatment oiled the bore and the rifle sans stock.

i looked up the bore(with a flashlight) and i'd guess that the rifling is about 50% good. there was no pitting in the bore, i "guess" that chrome lining was involved. i have some cerrosafe......somewhere, but i just can't find it. i'll do a lead slug and report it to you guys. i also need to buy a front sight insert alongside other rifle parts(91 argie, 1898 krag, 93 and 95 mauser parts and pieces).

 

[Joshua]

The rifling on these don’t look like anything most of us are used to. I am doubtful that you are at 50%. They are shallow and don’t have sharp corners.

The Lee-Metford and the Arisakas where the last service rifles to use this type of rifling. They are mentioned in the wiki article.

Polygonal rifling - Wikipedia

en.m.wikipedia.org

 

[todd]

i did not know that. i learned something new today. the "rifling" had no or next to no corners. i seriously thought to rebarrel it

 

[fiver]

think Marlin lever rifle.

 

[Joshua]

think Marlin lever rifle.

Curious? Please elaborate, sir.

 

[fiver]

just the way you approach getting them both to shoot well.
generally a little larger diameter and a somewhat harder alloy gives the best results.
you have to maintain the integrity of the bullet, and sealing the edges so the bullet can grip the rifling is actually harder with the rounded rifling.

the rifling is designed to not mess a jacketed bullet up much, so that the jacket can maintain it's integrity on impact with it's target.

anyway a soft alloy just has no way to retain it's sidewall integrity and will skid on the rifling trying to dig in, even paper patching struggles with holding the rounded rifling, and it doesn't shred well at the muzzle either.