Powder Position and Pressure

[kneelingatlas]

http://blog.westernpowders.com/2014/11/powder-position-and-pressure/

I just read this article on the Ramshot blog, anyone have any experience to share?

[njl]

If you have a chronograph, it's easy enough to measure. I did this one day a while back with two .45acp loads:

.45acp

200gr Precision FP (moly coated lead), 4.8gr WST 1.195" OAL, CCI LP.

I tested these in my 21SF by pointing the gun up (or down) before each shot.

UP: I did 2 strings...just to be sure, and got 840 and 849 fps averages.
Down: 758 fps average

.45acp
Zero 185gr JHP, 5gr WST, 1.195" OAL, CCI LP

I tested these in both my 21SF and 30S.

21 UP: 852 fps
21 Down: 770 fps
30S UP: 804 fps
30S Down: 707 fps

With this load, ES and SD were much smaller for the UPs than the Downs.

In all of these, there was a very noticeable difference in recoil between the ups and downs. I'd heard of position sensitivity, but I was amazed by the size of the effect.

[BeerBaron]

that's one more good reason to load open major and have a nice full case of powder!!