Archived Posts » 59,646,491
PSL springs and heavy ammo
11/15/2011 10:41:20 AM
I recall having read previously that there's a reason to use only light ball in PSL's, that too heavy of ammo would recoil too much and beat up the springs and rear trunnion. Is this applicable to reloads I might do with 174 grain BTHP's or is it just a matter of the surplus stuff being loaded extra hot for MG's? At what point is it an issue? Can heavier springs be had to mitigate the problem? I'm wanting to load the 174's for high BC for 600-800 yards if the gun will perform to that range.
Your thoughts?
Your thoughts?
11/15/2011 3:33:34 PM
Originally Posted By Addicted2Fish:
I recall having read previously that there's a reason to use only light ball in PSL's, that too heavy of ammo would recoil too much and beat up the springs and rear trunnion. Is this applicable to reloads I might do with 174 grain BTHP's or is it just a matter of the surplus stuff being loaded extra hot for MG's? At what point is it an issue? Can heavier springs be had to mitigate the problem? I'm wanting to load the 174's for high BC for 600-800 yards if the gun will perform to that range.
Your thoughts?
I recall having read previously that there's a reason to use only light ball in PSL's, that too heavy of ammo would recoil too much and beat up the springs and rear trunnion. Is this applicable to reloads I might do with 174 grain BTHP's or is it just a matter of the surplus stuff being loaded extra hot for MG's? At what point is it an issue? Can heavier springs be had to mitigate the problem? I'm wanting to load the 174's for high BC for 600-800 yards if the gun will perform to that range.
Your thoughts?
Restrict the gas from the barrel to the tube ... then use what ever you want
11/15/2011 6:59:50 PM
Originally Posted By Mark75H:
Restrict the gas from the barrel to the tube ... then use what ever you want
Originally Posted By Addicted2Fish:
I recall having read previously that there's a reason to use only light ball in PSL's, that too heavy of ammo would recoil too much and beat up the springs and rear trunnion. Is this applicable to reloads I might do with 174 grain BTHP's or is it just a matter of the surplus stuff being loaded extra hot for MG's? At what point is it an issue? Can heavier springs be had to mitigate the problem? I'm wanting to load the 174's for high BC for 600-800 yards if the gun will perform to that range.
Your thoughts?
I recall having read previously that there's a reason to use only light ball in PSL's, that too heavy of ammo would recoil too much and beat up the springs and rear trunnion. Is this applicable to reloads I might do with 174 grain BTHP's or is it just a matter of the surplus stuff being loaded extra hot for MG's? At what point is it an issue? Can heavier springs be had to mitigate the problem? I'm wanting to load the 174's for high BC for 600-800 yards if the gun will perform to that range.
Your thoughts?
Restrict the gas from the barrel to the tube ... then use what ever you want
My sentiments exactly. That's why I built this:
Another technique that is much easier is to thread the gas port and experiment with threaded inserts of different size to restrict gas flow.
11/29/2011 3:35:48 PM
I threaded my gas port for an 8-32x1/4" set screw, and originally tried a 1/16" jet. FTE every other round. Opened it to 5/64", now it works perfectly. The impulse is much smoother, I can't notice the carrier moving anymore. The brass is ejected only a few feet away, with very little denting at the mouth or shoulder.
The only thing I can recommend is have your port tapped by someone good at it. My threading isn't so great, but it worked. I'm worried the stainless screw may gall or expand and seize, but now that it works it's not a big deal.
The only thing I can recommend is have your port tapped by someone good at it. My threading isn't so great, but it worked. I'm worried the stainless screw may gall or expand and seize, but now that it works it's not a big deal.
12/7/2011 9:53:20 PM
Originally Posted By sodacansniper:
I threaded my gas port for an 8-32x1/4" set screw, and originally tried a 1/16" jet. FTE every other round. Opened it to 5/64", now it works perfectly. The impulse is much smoother, I can't notice the carrier moving anymore. The brass is ejected only a few feet away, with very little denting at the mouth or shoulder.
Looks like that's exactly what I'm going to do. Would you say the recoil is less because of the gentler action cycling? Since the stock is very short, I'm thinking I'll share this rifle with my wife a fair bit so toning down the recoil is a pretty big priority. I was noticing that the YouTube videos were showing a lot more motion than should be expected from a 9 lb. .308.
I threaded my gas port for an 8-32x1/4" set screw, and originally tried a 1/16" jet. FTE every other round. Opened it to 5/64", now it works perfectly. The impulse is much smoother, I can't notice the carrier moving anymore. The brass is ejected only a few feet away, with very little denting at the mouth or shoulder.
The only thing I can recommend is have your port tapped by someone good at it.l.
I'll have to use that as a pickup line.
