primer choice and slam fire
- Thread starter RoscoeT
- Start date
I fail to see how hand releasing the bolt the way he did would be any "slower" than firing conditions...the one difference would be that under "firing conditions" the rifle would be stripping additional rounds out of the mag or clip...and slowing the bolt down. I you regularly hand feed round into the chamber of your semi...and slam the bolt down...then you're an idiot (like the guy in the video)
I'm also pretty sure that my factory Winchester .223 rounds...and my factory Federal .223 (American Eagle) are not using CCI primers
I see 1,000's of rounds of the above ammo being fired out of AR15's every year...with no issues
Sounds like a solution looking for a problem...
I'm also pretty sure that my factory Winchester .223 rounds...and my factory Federal .223 (American Eagle) are not using CCI primers
I see 1,000's of rounds of the above ammo being fired out of AR15's every year...with no issues
Sounds like a solution looking for a problem...
This is a good illustration of the conventional wisdom about selecting the best primer to avoid the possibility of slamfires in SA rifles with a floating firing pin.
Irrespective of the primer used these rifles should always be loaded from a mag or clip in order to retard bolt velocity and firing pin inertia on chambering. Note that the fellow has'nt done this. He simply dumped a round in the chamber and let the bolt slam closed from the fully retracted position. Even at that there was no primer detonation.
Some other comments to help avoid slamfires:
-primers must be seated below flush with the casehead. Use a primer pocket uniformer to achieve this and always clean the primer pockets before re-priming.
-check firing pin protrusion from the bolt face. There is a max/min reading for this and there are differences in bolts and firing pins due to manufacturing tolerances. If you have a gauge and a supply of firing pins you can install one on the minimum side.Some,but not all firing pins will "kiss" and impact the primer when the bolt closes. I aim to avoid the "kiss" and still keep the firing pin protrusion at minimum or slightly above.
-make sure that cases are FL resized to a point where they chamber freely w/o any resistance. This is another precaution to minimize the depth of firing pin impact on the primer.
-ensure the firing pin channel inside the bolt is free of crud/oil/grease/rust/brass particles which might cause the pin to bind in a foreward position.
Irrespective of the primer used these rifles should always be loaded from a mag or clip in order to retard bolt velocity and firing pin inertia on chambering. Note that the fellow has'nt done this. He simply dumped a round in the chamber and let the bolt slam closed from the fully retracted position. Even at that there was no primer detonation.
Some other comments to help avoid slamfires:
-primers must be seated below flush with the casehead. Use a primer pocket uniformer to achieve this and always clean the primer pockets before re-priming.
-check firing pin protrusion from the bolt face. There is a max/min reading for this and there are differences in bolts and firing pins due to manufacturing tolerances. If you have a gauge and a supply of firing pins you can install one on the minimum side.Some,but not all firing pins will "kiss" and impact the primer when the bolt closes. I aim to avoid the "kiss" and still keep the firing pin protrusion at minimum or slightly above.
-make sure that cases are FL resized to a point where they chamber freely w/o any resistance. This is another precaution to minimize the depth of firing pin impact on the primer.
-ensure the firing pin channel inside the bolt is free of crud/oil/grease/rust/brass particles which might cause the pin to bind in a foreward position.
