Quote:
Originally Posted by postino
...Until you try to put the toggle axle pin in...It's pretty much a precise fit...
Part of the problem with 'spreading' the sides is that both sides want to spread at the same time whether you support them or not...I toyed with the idea of making a special mandrel to insert into the receiver, with a drilled & aligned hole for a 8.82mm rod that would enter the barrel...Then you could work on 'spreading' the sides one at a time...
I do have a brass receiver insert for my barrel swaps; in an emergency (which is doubtful in my future) I could drill it and insert a squib rod to make a shade-tree fixture...But that axle pin is the most oddball size ever designed; not Metric and not Yankee...Not Inch, not Letter size, not Number size...You'd have to make up a special pin (or use a spare axle pin) to test your alignment after every tweak...
...Or just box it up and send it to Gerry!!! 
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I was thinking about supporting and clamping the barrel, instead of using a rod in the bore. If you lay it flat on its side and clamp it both at the muzzle end and right at the chamber, you would only be bending one rail... or?
But yeah, boxing it up and sending it to Gerry sounds like a safer alternative.