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Dr. Courtney
Senior Member

USA
561 Posts

Posted - June 27 2017 :  1:12:31 PM  Show Profile  Reply with Quote
quote:
Originally posted by Jim Higginbotham

All one has to do to compare is take a regular wooden pencil with an eraser and put it down the barrel *do make sure it is clear!*, point the gun skyward and press the trigger.

The difference between most SA hammer guns and almost all striker fired guns is phenomenal.

DA autos and revolvers are sort of in between.

The real sticking point though is that nearly all striker fired guns do not have much in the way of firing pin travel and if you get a bunch of ammo that has a healthy crimp or short case length that extra few thousandths of an inch is enough to prevent the round from firing.

Add to that some are sensitive to lube migrating into the striker channel - a hammer gun does not really care where you put the lube.

There is a reason JMB got away from striker guns (he did try on the French contract for the 9mm but he ditched that one in favor of the hammer).

No question the striker fired guns work most of the time - but they are more dependent on perfect ammo. I found that even revolvers are more dependent on primer seating depth than hammer type autos when I finally got one in .45 ACP. I had to load revolver ammo much more carefully.

Just Ramblin'

Jim H.




Great ramble, Jim. That pencil test (or a minor variation) will come in handy as we are planning some performance testing of lead free primers. It will be very useful to quantify firing pin (or striker) energy. Thanks!

The sole arbiter of scientific truth is repeatable experiment.

email: Michael_Courtney@alum.mit.edu
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pochis
New Member

USA
68 Posts

Posted - September 14 2017 :  09:18:07 AM  Show Profile  Reply with Quote
still curious as to how Jim liked the m&p 2.0 45
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