At LAST, the .300-221 Rimmed reamer has arrived
Sent PTG three formed .300-221R cases to take measurements from using their optical comparitor, also measured the neck thickness of 20 357 Max cases as well as 20 formed cases to ensure the reamer neck diameter was correct.
The normal 2-3 month custom reamer timeframe was lengthened by a couple of communications stuff-ups and then the Go/No Go Gauges were found to have been made up to the wrong specs! Once notified, PTG acted very quickly to rectify the problem however, and new gauges were promptly sent out.
Very pleased with their customer service overall...
Because of the nature of headspace in a falling block action (and potential slack in the linkage pins) I elected to have the rim gauges made up at .060" Go and .065" No Go.
NOW... I want to use this project to determine whether my chosen .300-221R specs for case length, freebore, neck clearance and leade angle will work with cast projectiles yet still allow longer jacketed projectiles (SMK etc) to be chambered down a standard Martini Cadet action ramp... I don't want to be grinding down the ramp and weakening the action
Some interesting barrels being produced at Truflite in NZ:
http://www.truefliteriflebarrels.co.nz/13544/index.html
I have an old Omark 44 .308 win heavy target barrel with a shot-out throat but otherwise great bore ($20 at a Gunshow!) that would be just perfect as a 'test mule'... the heavy profile will easily turn down to the Cadet's 1" external profile and .750" x 14 tpi barrel tenon.
Twist is 1:9.5" so it may not stabilise the really heavy slow stuff but I can then determine whether I like the round enough to stump up for a nice match grade 1:8" barrel.
I will post again when I have something to share... but as Captain Oates once said "... I may take some time"
