cohunt
Well-Known Member
I know this question is loaded, and depends on cartridge--but I was just curious if anyone could estimate
I have a type 99 arisaka in 7.7"JAP" got from a relative a while ago (handed down supposed war take home trophy)--this rifle still has the mum and matching numbers and is in extremely good condition, lacks the bolt dust cover but has a phenolic type of muzzle cover/cap on it--- the cleaning rod numbers do not match though --it has the AAC side bars on the sight too
Just for kicks, I bought some ammo for it to give it a whirl and he thing shot like crud--- so I stuck the bore scope down the barrel and was surprised at what I saw
starting at the chamber end, I saw little to no pitting with a very shiny smooth bore, the chamber was clean as well and the rifling was there but looked shallow---- as I proceed down the bore towards the muzzle the bore condition looked just as good but the rifling looked more worn--- by the time I got to the muzzle there was literally no rifling left-- ZERO-- it is truly a smooth-bore at the muzzle .
Any idea how many rounds of 7.7x58 it would take to shoot out a bore like this? it amazed me that the rifle exterior is so good, but it has clearly seen its days of shooting--- reload data shows it pushes a 180 gr bullet at about 2200fps-- that would be a fairly low pressure round I would think somewhere around 35-40000psi --probably take quite a while to shoot out that barrel --- these were supposedly chrome lined and polygonal rifling too
I have a type 99 arisaka in 7.7"JAP" got from a relative a while ago (handed down supposed war take home trophy)--this rifle still has the mum and matching numbers and is in extremely good condition, lacks the bolt dust cover but has a phenolic type of muzzle cover/cap on it--- the cleaning rod numbers do not match though --it has the AAC side bars on the sight too
Just for kicks, I bought some ammo for it to give it a whirl and he thing shot like crud--- so I stuck the bore scope down the barrel and was surprised at what I saw
starting at the chamber end, I saw little to no pitting with a very shiny smooth bore, the chamber was clean as well and the rifling was there but looked shallow---- as I proceed down the bore towards the muzzle the bore condition looked just as good but the rifling looked more worn--- by the time I got to the muzzle there was literally no rifling left-- ZERO-- it is truly a smooth-bore at the muzzle .
Any idea how many rounds of 7.7x58 it would take to shoot out a bore like this? it amazed me that the rifle exterior is so good, but it has clearly seen its days of shooting--- reload data shows it pushes a 180 gr bullet at about 2200fps-- that would be a fairly low pressure round I would think somewhere around 35-40000psi --probably take quite a while to shoot out that barrel --- these were supposedly chrome lined and polygonal rifling too