1911flyr

Ditto on removing the spring. +or -.001.

A faster powder with heavy bullet will sometimes cause a squib. The JP-5 is about 5 PF less the my GMR-15 with the same load. I loaded a coated lead 147gr with 3.0gr of N320 and got 133pf. You would probably need at least 3.3 to be safe with a jacked bullet. Check JP video for PCC loads. They hand several barrels returned with multiple bullets in the barrel.

With a 124 PD JHP and 3.8 N320 I get 126 PF in the JP-5. 132 PF with 4.0 N320. I would not us N320 with the JP-5 and heavy (147gr) jacketed bullets. You should use a slower powder with the heavier bullet in a PCC. By the way, all my loads 147, 124 and 115 have been about 5 PF less in the JP-5 than I had in my GMR-15 for the same loads.

I have chronographed my 115gr PD JHP load in my GMR15 and JP5. The GMR is 5 PF more than the JP5. Same with the 124gr load.

My go to load for my GMR15, with short, was a 115 JHP PD with 4.6 WSF at 1.1. About 135-138 PF. Very accurate. This is also my load for the JP5. It is slower in the JP5 at 131-133 PF. No leading up the comp.

No it is not. They have a separate magwell for the JP-5

My JP5 was the competition model and it came with a vertical comp. I don’t think the comps make a difference with sub minor loads but the vertical comps make a difference with hotter loads.

That’s what I get with the 80*. The dot hardly moves. Feels a little like a AR. Some recoil in the shoulder but muzzle stays level. About the same with the 70* with hotter ammo.

The 70* locking piece work well with hotter loads. At least 135 PF loads with the 70*. Any lower PF will sometimes not fully extract the brass and jams. I can use the 80* with lower PF. These are 115 JHP’s

Shipping on mine was $40

I could not tell much difference at all.

My JP5 loads 115 PD JHP @ 133 PF 4.6 WSF @ 1.12 OAL 124 PD JHP @ 130 PF 4.4 WSF @ 1.12 OAL 147 PD JHP @ 129 PF 3.74 WSF @ 1.12 OAL I am going the try some CFE pistol loads next. I am using the 60* break. The 115 is my favorite load. I tried double taps at 15yds for each load. Paper doesn’t lie. The 147’s were softest but the 115’s were the closest groups with .17 splits. By the way, the GMR was exactly 5 PF more than the JP5 for the same load. My GMR is a 14.5” barrel with a pin and welded comp and JP short stroke installed. Also, my friends GMR is a 16” then comp is slower than my 14.5”. I think you will find a slower powder like WSF feels softer than a fast powder. I have tried N320, W231 and Titgrope. Caution should be used with fast powders and heavy bullets. Squibs are possible.

The note with the FP only said more reliable ignition.

There is a slight but noticeable difference. To the gentleman that says his GMR shoots soft. I will disagree. I have over 80,000 rounds through my GMR and a short stroke kit from JP. The JP5 is significantly softer with little to no red dot sight movement.