stubbicatt
03-26-2009, 08:16 PM
Guys, today I went to the range and wrung out my P7 shooting standard velocity defensive sort of rounds. It was as always, quite accurate.
The combat sights shoot right to the point of aim, which is good for that purpose.
The purpose I have in mind is perhaps bullseye league.
(OK, OK, let the laughter die down.... :670:)
To do this I was contemplating some heavier slugs, traveling at velocities and pressures generated by "starting load" sort of recipes. My theory is that a little longer barrel time and the rounds may impact a little higher than the 115s I've been shooting. I see this as a benefit as perhaps I can use a 6 o'clock hold.
-- I haven't tried this yet, and here's why --
If I shoot lower pressure loads, and lower velocities, with longer barrel time, do I run the danger of having the action open too soon with this gas delay blowback system? Seems to me that a higher pressure loading will tend to keep the action shut for longer than a lower pressure load, as there is more gas acting with greater pressure against the piston, and that the bullet leaving the barrel quicker, at higher velocities, will allow pressures to subside substantially before the action starts to open. These are factors that favor lighter, faster bullets, and which slower, lower pressure cartridges lack.
Anybody have any experience or any reliable sources of information on this topic?
Thanks.
The combat sights shoot right to the point of aim, which is good for that purpose.
The purpose I have in mind is perhaps bullseye league.
(OK, OK, let the laughter die down.... :670:)
To do this I was contemplating some heavier slugs, traveling at velocities and pressures generated by "starting load" sort of recipes. My theory is that a little longer barrel time and the rounds may impact a little higher than the 115s I've been shooting. I see this as a benefit as perhaps I can use a 6 o'clock hold.
-- I haven't tried this yet, and here's why --
If I shoot lower pressure loads, and lower velocities, with longer barrel time, do I run the danger of having the action open too soon with this gas delay blowback system? Seems to me that a higher pressure loading will tend to keep the action shut for longer than a lower pressure load, as there is more gas acting with greater pressure against the piston, and that the bullet leaving the barrel quicker, at higher velocities, will allow pressures to subside substantially before the action starts to open. These are factors that favor lighter, faster bullets, and which slower, lower pressure cartridges lack.
Anybody have any experience or any reliable sources of information on this topic?
Thanks.