Thread: Ok what is the difference between Small Pistol and Small Rifle primers?
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Old 03-03-2009, 10:30 AM
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Paul5388 Paul5388 is offline
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Dennis,

I don't know if the cup thickness is the same or not, which really doesn't say anything, since it could be a difference in the C260 alloy used to form the cup.

I do know the small rifle takes more hammer fall to ignite, which would lead me to believe there is a difference in at least the hardness of the cups.

I've used CCI 400s for over 30 years in .357 Mag and a lightened mainspring will not ignite them. When I replaced the mainspring in my M28-2 with a stock mainspring, the ignition problem with CCI 400s went away.
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