I love Forster reloading equipment. I am especially enamored with; 1) Forster using Hardinge collet lathes, 2) Purdie's seater die patent, 3) Purdie's co-ax press patent
CARTRIDGE CASE RESIZING AND BULLET SEATING APPARATUS
I like to see someone rise above the rank of passive consumer.
a) I got some imitation Forster lock rings from Sinclair that would not fit in the Forster nor Bonanza co-ax. I made a sketch and sent to to Sinclair [Brownells]. The parts were in tolerance, then the knurling upset the OD to be too big. I used a 7/8-14 piece of threaded rod as a mandrel and sanded off the sharp edges. Sinclair sent me new rings.
b) I called Forster and said that the bench rest seater die stem chamfer has a burr that is capturing or at least marking the bullet ogive. I was spinning them and sanding them off.
10 years went by and the next set of Forster dies had the same problem.
I read on line about guys glass bedding the seater mouth to fit their favorite bullet.
c) I made my own jaws for the co-ax press, but they are not better than Forster's.
d) I made my own handle for the co-ax press, but it is no better than Forster's.
e) I made my own wear plate for the co-ax press, but they are not better than Forster's. But if two co-ax presses take different die adjustments, one can balance them with wear plate thickness.
f) I made my own shell holder jaw housings and button head screws, and they have some advantages:
...1) The screws are pointed on the end to find the holes
...2) The screw heads are knurled so they can be tightened without an Allen wrench.
...3) The housing is thicker so that pulled out stuck cases does not bend it. It is machined 1018 steel, not cast.
...4) The springs are captive in holes, not trenches, so the springs do not shoot across the room when swapping jaw ends.
...5) The clearance hole in housing is large enough for the jaw opening screw long can pass through without jamming and bending the housing
I made a dozen housings and screw sets and sold them on line to guys I could see had co-ax presses.
More guys want them, but I am old and don't need money.
Now some young guy has got the drawing from me and made some with CNC. He is not selling the screws.
Here is a pic left to right of the Forster parts, then my parts, then the young CNC guy's housing.
He is not making the screws, as he is worried the taller screws will bump the frame casting and require a change in die adjustment. I am getting tempted to make a bunch modified screws, send them to him, and tell him to swap jaws 10 times as fast as he can.