Hello everyone, sorry for my bad english.
I write from Italy and in my country there is no possibility to choose the powder you want!
I have some IMR 800-X powder and I would like to use it to recharge the 7,5x55 Schmidt Rubin K-31 with Lee bullets 160 gr g.c. MOLD DC CTL312-160-2R / https://leeprecision.com/mold-dc-tl312-160-2r.html
which I can calibrate to .309 (LEE 90038 that I use for 30 Luger)
In the Burn-Rate Charts I read that the 800-X is a little more lively than the Alliant 2400 which is recommended in the starting dose of gr. 16.
I'd like to know:
1) - can I use this type of mold (being the TL type it is very suitable for lubrication with ALOX)?
2) - Can I use the .309 sizer or should I be the .308 sizer?
3) - What weight of 800-X powder can I use?
I also have NORMA 203 (NO NORMA 203-B)
What doses can I use with Hornaday Match 30 cal. .308 168 gr BTHP # 305016? Norma recommends the 203-B gr. 43-46.3 for Sierra MK168gr.
For the old NORMA 203 (NO 203-B!) I read a dose of gr. 40.5. What do you think?
I can use the OLD NORMA 203 also for the Lee 160 gr g.c. MOLD DC CTL312-160-2R /? In what doses?
Thanks
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