“You can see how much out of square case heads are. Stand them bottom down in the V of a steel square taped to a table top then spin the case holding the case head in the V so it spins on its axis. Watch the case mouth from straight over it. Set up a magnifying glass over the case mouth and it's easier to see. Square case heads let the case mouth spring on its axis. Out of square ones makes the case mouth spin about someplace off the center of the case mouth”
“You can see how much out of square case heads are” I have the set up table. I have ‘V’ blocks in sets, I have height gages, last word/spot on gages, etc., Again, my favorite case is the case fired in a trashy old chamber, when checking a case head ‘for square’ I am finished before ‘the you’ person you are talking about locates all the tools.
“From CWO4 Billy Atkins, USAR Rifle Team Captain (some years ago)....” I will assume CWO4 Atkins is/was a reloader, I will assume a rifle that has not had the bolt faces squared is out of square, I will assume if bolt lugs are not squared they are out of square. I will assume no one indexed the case in the chamber before firing, I will assume the reloader/”benchrester” Indexed each of 12 rounds before firing and then reloaded all 12 rounds and started over with one difference, the difference? The 12 rounds were indexed in groups of 3 at 360 degree, 90 degree, 180 degree and 270 degree when fired. Again, the conversation always starts with after firing, no one starts with the effect the chamber had on on the case when fired, seems a benchrester/rifle team that reolads would know the difference in length between the length of the chamber and the length of the case, as in from the bolt face to the shoulder of the chamber and the length of the case from the head of the case and the shoulder of the case.
then I will assume they “the rifle team’ measured before and again after. Then there are the ‘benchresters’, I have no ideal how they get to the range without knowing anything about the rifle they are shooting, I could be shooting a $120.00 rifle, right there when I compare my $120.00 rifle to the $1,000 ++ the benchrester spent on their rifle I have to suspect there is a difference.
I am building 2 bench rest type rifles, with out wood and trigger I will have no more than $180.00 in each, the difference between me and the benchster? I will know the length of the chamber, I will know the length of the case, when fired I will know the effect the chamber had on the case.
Bench rersters full length size, full length sized is more accurate?
Again, I have a non-Weatherby rifle with a non Weatherby chamber (300 Win Mag), after 74 rounds of one brand of ammo it became a rifle that shot one hole groups a most accurate rifle, I have a Model 70 Winchester chambered in 300 Win Mag, with the same ammo it shot patterns, ‘it’ does not boil down to benchresters and full length sizing and or new ammo, or fired cases being restored to minimum.
The $120.00 rifle does not have all the inherent problems most rifles have, 12 different loads of 10 rounds each (new, once fired, 12 different bullets, commercial new and once fired and military cases with different dates), Each of the 12 groups could be covered with a quarter on one target and some groups shared the same hole. I purchase the rifle for parts in case it was not worth $120.00.