[QUOTE=stcummingsjr;499703]"How will you measure them to see if they are out of true to start with? How will you measure them to see if you made an improvement when you are done? If you can't measure them, you are doing nothing more than cutting and guessing. "
This was in fact what was driving me nuts and drove me to post. I usually can wade through and come up with a pretty solid answer on most stuff. *I have yet to hear/read of anyone using the hand squaring tool from brownells, ( as noted for good reason by fitch) *I can't get past that it was designed, maybe poorly to accomplish a squaring task- but as it has been pointed out...I will never really know if it did any good of not. Has anyone ( maybe back during your cheap sluming days
ever try one for kicks? I would assume that if operated properly it can't make things worse... But I'll never know
Maybe I can walk you through the scenarios and help you decide which way you want to go.
Doing anything by hand allways has it's risk. The reason the Lathe process is preferred is that It
Is precision and leaves little room for error if set up correctly.
Threads are not allways precision and perfectly on the center line of the action (The main reason
we chase the threads with a threading bar or boring bar with a threading tool and not a tap).
This trues up the threads to the center line. (This is done before the tenon threads are cut).
The hand tools can chatter or deflect enough to prevent 100% contact with the recoil lug and
the receiver and that is the main reason for squaring in the first place.
With a lathe setup, you can measure the out of squareness before you start and know exactly
how much to remove.
As someone said if you cant measure for squareness it may be OK and you run the risk of making
I have seen receivers that were 4 or 5 thousandths out and on these even doing it by hand
should be an improvement.
I think highly of Dave Manson's tools but I am unsure that I could do a perfect job with any hand
tool so I rely on the Lathe to make up for my shortcomings.
It would be nice to be able to set up on the Lathe and check the trueness and then use the hand
tool and then set it back up in the Lathe and check It and see how accurate it was.
I dont have a hand tool for this or I would test it just to answer your question.
I will say this , Just because you use a Lathe doesn't mean it will be true if it is not setup
correctly. I have seen many custom rifles
that were not true because of setup or lack of caring.
J E CUSTOM