What trimming was necessary? Do you think the slightly thicker case walls  from forming contributed to case longevity? What were the donor cases?

condorsc wrote yesterday at 5:23am:


Initial trimming was necessary after the Rem. cases were resized from .45-70 to .40-65.  Other than tightening a few of the primer pockets lately, nothing else was done to the cases.

Wayne

I've been using the same Win. cases for 30 years since forming them to .40-65.  They have at least 40-50 firings on them, have never been re-trimmed since they were formed, and the primer pockets are still satisfactorily tight.  Probably will outlast me.

Clarence

JHand wrote yesterday at 10:14am:


Here ya go
Tightening large primer pockets

See the following video: (You need to Login or Register to view media files and links)

Items needed:
•      0.209” pin gauge
•      0.210” pin gauge
•      In place of the two pin gauges a primer pocket go/no-go gauge is available from Brownells (100-015-614WB Large Primer Pocket Swage Gauge)
•      5/8” hardened chrome steel ball bearing
•      Hammer
•      Flat file
•      Long bolt that snugly fits the case necks.  Make sure the end is nice and flat.

If the .210” pin gauge slides into the primer pockets than the pocket is too large.  The goal is to reduce the diameter of the primer pocket until the .210” gauge will not fit and the .209” slides in but is a snug to tight fit.

•      Place the ball bearing on the top of the slightly open jaws of a vice.  If the ball bearing tends to roll out of position, tap it with a hammer to make a small indentation in the edges of the jaws for the bearing to set in.
•      Insert the bolt into the case.
•      Set the case primer pocket on the ball bearing and strike the bolt with a hammer to flare out the inside of the primer pocket.
•      Once the primer pocket is sufficiently tight the file is used to remove any ridges or raised metal around the primer pocket created by the tightening process.  When finished the face of the case head should be flat.

Wayne