Mr. Stool, Please don't leave yet, you have so much to learn.. Wilbur this is going to get lengthy not sure if there are rules on this remove or what ever if you need to. O.K. Mr Stool I will try and explain this so even you can understand how you can adjust t.i.r in a steady rest. Now focus Focus FOCUS. Take a piece of steel tubing 2 1/2 dia. 1/2" wall cut 19" long. face and center both ends. drill and tap 5/16 24 holes 4 each end at 90* to each other .38 from each end. Grind o.d no taper end to end o.d. size not critical. Layout barrel for length, weight I use .840 muzzle dia. 22 " long 1 in straight 1.25 dia. Place barrel in tube with .84 dia 1 3/4 from end of tube. with barrel between centers indicate both ends of tube true. now chuck tube in 4 jaw or adjust true chuck and indicate , put center in chamber end set steadyrest part off excess barrel length leaving 1.25 sticking out. face and bore center. O.K. FOCUS lets set up for ppc length case. using afore mentioned indicating methods you know the one that gives real readings. run probe in 1.52+ throat length .040+ 1/2 freebore length .070 = 1.630 this will put under 5/16 adjusting screws( by the way they have round head brass screws on clamping surface). now indicate throat in at 1.63 length. When good move indicater in .5 -.75 (I do know they don't go 90* in a 1/2 in. but in the few hundred I have cutoff .005 -.010 is real common) now indicate at this point by adjusting screws at muzzle end get this point and throat running together. you will have to tweak chamber end adjusting screws and muzzle end adjusting screws to accomplish this. rebore center, put center in turn tenon length leave + .020 on thread o.d., next drill and bore for chamber, ream to headspace . Check t.i.r. and adjust if needed if good rebore center, put center in finish o.d. of threads,thread , cut c'bore. flip around indicate chamber side of tube. Heres the interesting part remember adjusting to get throat AND in front of throat concentric I check to see how much muzzle runs out (.020 about normal but I have had a whole bunch more as in .08-.100. ) now indicate muzzle end with screws at muzzle end to 00 at end then move in .75 and tweak with adjusters at other end to get two running concentric. face off square Now both ends are straight and in front of both ends are true. I have different length and o.d tubes for other length and o.d. barrels. I guess this dismisses not being able to adjust runout in a steadyrest. So hope you now understand this method will work not saying its better or worse but I will stand on 3 nat. wins with my method bert r. 92 and 96 1 with an action I built 2013 me ubr als my action also various world records shot using either my gunsmithing or bullets I have made or bullet dies I have made. I did see your other thread on" beginner needing help"
thought it very interesting your lathe isn't "up and running" have you actually done any chambering ? In closing I don't understand where your not getting the point I have not drank in years but if you think I am you can test for drugs or alcohol I will send hair, blood, urine or a STOOL sample if you wish...The Tool Maker From Hell A.K.A. lemming
