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Discussion Starter #1
I only have an M&P 40.

I only load .40.

I've only been loading for a few months.

I only have Federal primers.

I only have 155gr Rainier bullets.

I only have Hodgdon HP-38 powder.

I just got a chrony on Monday; so now I can see what my loads are really doing.

I also got some Viht N340 and some Winchester primers; so now I can start having some fun.



I think reloading without a chrony is a bit like driving without eyes.



I'm getting a very slight striker drag. And I'm not having failures, but the gun feels like it's barely extracting.



So I got a slower powder to impart longer force on the extraction mechanism. And I got a slightly cooler primer to see if that helps the drag.



I don't even know if N340 is slower than HP-38, or if Winchester primers are cooler than Federal, that's just what people have told me.



Am I on the right track here, or am I completely out of my gourd?



Thanks.
 

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If it shoots, chronos right, feeds, and cycles, shoot it.



I get light drag marks also. Its not over pressure, so i'm fine with it.
 

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Full size 9mm.I get a little primer wipe but a big puddle of primer flow that gets slamed flat when the case hits the slide.All brands of ammunition do it.Not one problem so far.



Ed
 

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Much like the glock makes smeary square striker marks, the M&P makes a kind fo teardrop striker mark. At least my .40 does it on every type of ammo I have shot.
 
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