Everything I know about the particular rifle in question and the rifle in terms of its greater manufacture can be written on a train of rice .
Yes that was my best opening joke .
About a yr before my Dad passed away he bought a 6.5 Ja......Arisaka presumably a Type 38 , ground mum , basically GI gun . I have also a heavily sportered laminated nailed stock 7.7 that , well let's say "domoarigato" isn't among the words I have for our progress .
So sticking with the 6.5 only , and presuming it is still in it's original chambering , what do I need to be looking for in brass . I have a little bit of 7×57 and 257 Roberts but the last time I went looking for that I found 264 WM and 32 Rem first and in greater quantity , so I'm happy to ruin some perfectly good 270 for the effort if that is useable . I have a set of 6.5×257 AI on hand and a correct set that should be in hand any day now .
Do I need to worry about fat chambers or smaller chambers for that matter ?
Is there a typical groove dia ? I have 4-5 6.5 moulds the 266469 and NOE 270-140 come immediately to mind .
Powders I've become fond of IMR 4350 in 30-35 cal for full power heavies but I have H4831 and 4198 available . Of course Unique to figure out sizing etc .
Should I lean towards thick necks or size and ream again after the form and trim ?
Is it common to have long chambers . Might be important if I decided to shoot some .260-120s or the like patched up .
What's the design weight for GI loads ?
Yes I know I could have read a book and my 67&72 Hornady books probably have all of this but first hand from the field is more interesting .