So according to this chart - no difference in SIZE across pistol and rifle calibers, only softer or harder metal, and change of compound from black to smokeless powder. ??
Primer pocket dimensions and tolerances
Heres the SAAMI specs
Pocket Type........Depth Min...Depth Max...Diameter Min...Diameter Max
Pocket Dimensions
Large Rifle ...........0.1250.......0.1320.......0.2085....... 0.2100
Large Pistol...........0.1170......0.1230........0.2085. ......0.2100
Primer dimensions
Large Rifle...........0.1230.......0.1360........0.2105. .......0.2130
Large Pistol..........0.1150.......0.1260........0.2100. .......0.2120
some things to note
Pocket diameter = same
Pocket depth = .008 - .010 different (LR deeper)
Primer Diameter = LP .005 - .010 smaller than LR
Primer depth = Large Rifle .008 - .010 Taller than Large Pistol
The difference in primer height / pocket depth was what I got with my calipers when I measured this.
The 44/40 cases I measured would have covered the period from 1955 - 60 Dominion manufacture to 2015 Starline