| Cashman |
| (.224 member) |
| 23/01/12 06:51 AM |
Re: The best Mosin sporting rifle project in world history
|
Quote:
I am familar with the 12x75R shotgun cartridge concept.
understand that someone grab this brass you mentioned out of the factory like the primed 22 lr cases you find sometimes.
you would be to short with 9,3x53R brass open up to .458 but you will allready know this. two weeks ago I was making 10,75x52R brass from 8x56R and 53mm was the maximum left over from the 56mm it starts. I am dare to say you would not get more than 51mm from a x53R case.
If I would start with an 8,2x53R or a 7,62x53R that would certainly be the case. I´ve already made some 30 of .45x54R (52R) cases out of 9,3x53R cases and the medium length is closer to 52 than 51. This doesn´t matter since that is long enough and works for practice shots... After them firing the first time, the cases had fireformed and “grown” additionally a few tenths of a millimeter.
You are right they are not 52mm, but let´s not split hears. The actual “trim-to-length” for the .45x54R is 53,8mm, but I still call it an x54R.
Regarding the grabbing of brass from the production line. I don´t know how it´s done, but I know that who-ever does it, does it with the permission from Sako and with good intentions... I wrote to Norma and Lapua to ask if they could help us. Norma replied shortly "No" and Lapua I haven´t heard from since. Mayde I asked the wrong person at Lapua.
A small private company in Germany offered to help me make cases from scratch, but I would have had to order by the thousands… The price wasn´t too bad though… http://www.huelsen-horneber.de/rechts_engl.html.