Hello, my name is dlumpkin, am trying to find jap ammo 6.5 x51. Have tried 6.5x50 it blew primer out ,6.5 x52 bolt will not close ,have tried ammo sites no luck.
Printable View
Hello, my name is dlumpkin, am trying to find jap ammo 6.5 x51. Have tried 6.5x50 it blew primer out ,6.5 x52 bolt will not close ,have tried ammo sites no luck.
There is only one caliber of 6.5mm Japanese ammo. Perhaps you have tried to chamber 6.5mm Italian, Swedish, Dutch, or Greek? Do not try to load a bag of gunshow reloads or mislabeled rounds into your rifle, only clearly marked, new factory 6.5mm Japanese ammunition.
I would bring your rifle to a gunsmith if you are unsure of the caliber. It may have been converted to 6.5x.257 Roberts which was a common conversion done in the 50s to these rifles.
Friend, You need to STOP and figure out what your dealing with instead of shoving any old cartridge in your rifle. You could wind up blowing the side of your face off, losing half your hand or maybe just a few fingers and an eye. worst of all you could hurt the guy next to you. Get the picture?
There seems to be some confusion as to the actual case length. Some sources show it as being an even 2'' or 51mm( Lyman 43rd edition) while others show it as being 1.984'' or 50.3mm( Hornady 4th edition & Sierra 5th edition). New unfired PRVI cases measure 2'' in length and are even headstamped 6.5x51R. These dimensions only pertain to the case OAL, all others are the same regardless of source.Quote:
Originally Posted by jonnyc
[quote=Eaglelord17;330300]converted to 6.5x.257 Roberts
Quite possible. They don't turn up often though, I've seen two. Both were carbines.
I haven't examined other 6.5 Arisaka chamber casts, but my Type 38 features a "stepless" chamber/throat transition that would allow considerable tolerance for case length. Distinctly odd in comparison to typical European and American centerfire chambers -
Attachment 62214
The only military 6.5x50 is the 6.5 Japanese cartridge. Were the rounds fired factory 6.5x50 or something else? If these are factory rounds that you fired and they blew out a primer then you have something wrong with the barrel of the rifle. If the barrel was just cut to .257 Roberts then the round would not have blown out the primer. If the barrel is original then there is obstruction in the barrel causing pressure to rise blowing out primers and it should be checked by a gunsmith.
Sounds like head space to me, find your self a good Smith !................
gunsmith said it was 6.5x51 can not find ammo
---------- Post added at 10:21 PM ---------- Previous post was at 10:20 PM ----------
yes they were 6.5 x50 factory
Can we see a picture of the rifle ?...................
---------- Post added 04-26-2015 at 12:01 AM ---------- Previous post was 04-25-2015 at 11:55 PM ----------
Actually if you round up the 6.5 jap. it would be 51 ie 6.5x50.8 !............Quote:
Originally Posted by dlumpkin
I'd rather see the case with the blown primer.Quote:
Originally Posted by 303tom
It depends on who's case you measure as to what length you get. A few thousandths one way or the other ain't gonna make no difference, 6.5 Jap is 6.5 Jap. As can be seen in Parashooter's photo at least some T38's lack a chamber step making an accurate determination of a standard case length difficult at best. The unfired cases I've measured(including a few WWII era Jap service rounds) range from 1.970'' to 2.00'' in OAL, the difference is in the neck portion only.Quote:
Originally Posted by 303tom
dlumpkin, regardless to what the gunsmith says you don't have an ammo problem, you have a problem with your rifle.
I am going to go out on a limb here, if it is blowing out the primer, it`s a Head Space Problem !.............Here is 6.5 Jap. Service MeasurementsAttachment 62299
primers backing out is a sign of excessive head space! a lot of JAP 6.5,s have it. no chrome bore like the type 99,s.
---------- Post added at 10:50 AM ---------- Previous post was at 10:47 AM ----------
a primer backing out is a sign of excessive head space, a lot of 6.5,s have it. no chrome boar like the type 99,s.
Primers backing out are often a sign of low pressures. You see it a lot with 30-30 and 35 Remington fired cases.
Here is some long forgotten data that I recorded FWIW
I measured Norma 6.5 Jap ammo at 1.603 to 1.608 with the Stoney Point/Hornady tool and the .350 gage dia. (yes the ammo varies)
My Pacific 6.5 Jap form/trim die resizes cases at 1.630
I checked the headspace of my Lee Fl sizer die and it was 1.608 with a .35 Remington case using the .350 diameter ring in the Stoney point tool.
The Japanese Type I seemed to have headspace right at 1.608 to 1.610. The metal of this rifle is in mint condition. You can see the Lee die, Norma ammo and the rifle chamber all seem to be the correct length relative to each other.
I do not have multiple dies or gauges for this round. I do have another Type I but I have never checked the chamber on it.
Here is an old link to some discussion of Jap headspace
If you are not familiary with the Hornady Stoney point tool - you can substract 2 inches from the caliper readings in this thread and make more sense out of the comments.
http://castboolits.gunloads.com/arch...p/t-12630.html