Originally Posted by
SAGE RAT DELETER
Somehow Doctnj I'm getting the impression you're mixing a COMPARATOR and a HEADSPACE GAGE...the comparator is for checking bullet ogives, bullet ogive to base for bullet seating depths and the headspace gage is for checking case shoulder to base lengths....in other words "headspace". Or did I miss something?The Giraud tool is good but expensive and is basically a iteration of the Davidson seating checking tool...also a bit expensive. Get yourself a Sinclair Int catalog and buy BOTH the Hornady Bullet comparator and Headspace gauge tool...roughly 30-40 bucks apiece. BOTH tools come with a set of 5 bushings that will do ALL the measuring you require...I've been using them since they were Stoney tools and making my own since the late 50's...BEFORE I had nothing but a hand drill, hack saw and files.I've used 2 machine nuts glued together as a comparator and pieces of different ID copper pipe cut to size and just squared off with a file as headspace gauges...even a sized brass case with the mouth ID smaller than the bullet and squared off, gently set over the case shoulder or bullet worked...not as convenient as the Hornady but they worked...you're NOT making an hydraulic pump to send men to Mars...getting within 0.001" is plenty good. Sinclair has ALL the goodies!!!! Remember...EVERY shot down the tube changes the throat depth by a tiny amount and the bigger the case, the more powder, the longer burn time, the higher the pressure, the "hotter the powder", the more of a change...it only took ~60-70 rounds to change the seating depth of the Berger 250 Hybrids in my 338 LM from ~3.825" to ~3.840"...0.015" and I used the same bullet for BOTH measurements.I also get the impression you seem to be getting hung up on minutia and trying to cover all the aspects of this game without beginning at the beginning and working up.BEFORE you get into the minutia you need to learn the basics and how to make do with things YOU can make...starting with a basic rifle and learn HOW to make it shoot almost as well as some custom jobby...that is unless you are rich, then just hire someone to teach you.Hey, Hoss...take your time and get off the internet and YOU-Tube...some of the vids I've seen just make me cringe. Most of the really good stuff is found in BOOKS and magazine articles, although you can find WHERE THAT information is found are online.All the information is found ON THE JOURNEY, not at the end...the end is just a nice bragging target or tin pot for your mantle...Luck
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