Sugarmaker, again, It is not fair, but, I ask again, if the ROCK CHUCKER cams over’ how much???? in thousands, I have deflection gages, strain gages, in reloading that is just name dropping I understand. RCBS makes a great press, if I thought it had a fault I would build a set of tools that would identify a/the problem.
Mass Hysteria, it happened when someone with a camera recorded the operation of a RCBS press with out a die and or shell holder, to everyone's horror the ram jumped forward at the top of the stroke and then, the reloading forums took on the nature of MASS HYSTERIA, and then blamed the Chinese, and totally disregarded my advise, “THE Rock Chucker in the video did not cam over” it jammed over, crammed over, etc, but, what ever it did, it did not cam over.
F. Guffey
On the light side, a friend, shooter, reloader builder of bench rest type rifles and pistols had a problem, I gathered up a few tools, dies and etc. and went for a visit, he is one of the few people I know that has more presses than I, for heavy work he has a modified A2 RCBS, the A2 RCBS is a cam over press.
I fixed his problem, when someone builds a rifle that shoots one hold groups it is difficult to impossible to find the problem, again those things do not lock me up. And I assured him nothing I did would improve accuracy.
Then there are bumpers, “I bump my shoulder .002 etc..” The old presses were designed to bump, I ask those that claim their press ‘bumps’ “by how much, how much when measured in thousands???? and they respond with “My press bumps”.
Anyhow , it has gotten talked to death, seems, in my opinion, ones opinion is more important to them than giving credit to the design or the person that designed it.
Back to bump, the cam over when adjusted was a control, when adjusting the die for sizing the ram was raised, the die was adjusted to the shell holder, impossible to grasp, but the difference between top dead center and the ram height after top dead center was the first adjustment before the proverbial 1/4 turn, the difference between the two height was “BUMP”. Now? bump is something reloaders do, and I find impossible, My cases have a tapper, the tapper forms a cone, somewhere out their beyond the cone is an apex, meaning I can not get my die to contact the shoulder without contacting the taper of the case body, shoulder and neck all at the same time, back to adjusting the press to bump.