So let me preface this topic first by saying that I'm of the crowd "if it ain't broke, don't fix it." That being said, I've dabbled in tuning my PCP's when I felt there was more accuracy or efficiency to be squeezed out of an already great gun.
I own the EDgun Leshiy .22 cal with 350mm barrel. I fully intended on using this gun with the new JSB Hades pellets from the start, opting to get this gun set up for sub 40 yard pest control.
I own a Huma reg for the gun but opted to stick with the factory reg for now, and detuned it from 130 bar (factory) to 110 bar, and then with just a few turns of the HST brought the velocity of the 15.89g pellets to 830 fps for roughly 24 ft lbs at the muzzle. I am getting about 34 shots per fill from 250 bar down to 90 bar. Yes I said 90 bar. The gun now falls off the reg with no velocity spike for about 3 more shots before velocity drops in the mid 815 fps range. At 30 yards, there is no POI shift, so I may be able to go even lower at closer ranges but haven't tested it out yet.
The problem, despite various velocity tunes, is that the Hades pellet just didn't want to group well past 30-35 yards. Sure it could keep 1 inch groups at that range, but I was disappointed that I couldn't really push the pellet much further without opening up my groups.
So today I opted to try out some JB Borepaste and the Swab-Its I had sitting in my closet but never used. This is an ideal gun to try this out on as you have direct access to the barrel with just removal of the front cap/baffel insert and a bit of prep work with some masking tape, and you're ready to go.
I ended up prepping the barrel first with Ballistol and cotton patches to remove any lead buildup first until they came out clean. Then I cut a Swab-It to the proper length and hooked it up to my power drill and worked the paste from back to front in 10 passes. I then re-cleaned the barrel with Ballistol and cotton patches until the bore came out to a mirror finish with no further residue.
This is the end-result of my labor.
Groups in the first three rows are typical BEFORE JB Borepaste at 30 yards. After re-leading the barrel, I re-zero'ed the scope with groups shown below the line. I was amazed at how much more accurate the gun has become! The left-most group in the bottom row was my last 5 shot group and I was super pleased with the end result.
I've turned into a JB Borepaste believer at this point!
I own the EDgun Leshiy .22 cal with 350mm barrel. I fully intended on using this gun with the new JSB Hades pellets from the start, opting to get this gun set up for sub 40 yard pest control.
I own a Huma reg for the gun but opted to stick with the factory reg for now, and detuned it from 130 bar (factory) to 110 bar, and then with just a few turns of the HST brought the velocity of the 15.89g pellets to 830 fps for roughly 24 ft lbs at the muzzle. I am getting about 34 shots per fill from 250 bar down to 90 bar. Yes I said 90 bar. The gun now falls off the reg with no velocity spike for about 3 more shots before velocity drops in the mid 815 fps range. At 30 yards, there is no POI shift, so I may be able to go even lower at closer ranges but haven't tested it out yet.
The problem, despite various velocity tunes, is that the Hades pellet just didn't want to group well past 30-35 yards. Sure it could keep 1 inch groups at that range, but I was disappointed that I couldn't really push the pellet much further without opening up my groups.
So today I opted to try out some JB Borepaste and the Swab-Its I had sitting in my closet but never used. This is an ideal gun to try this out on as you have direct access to the barrel with just removal of the front cap/baffel insert and a bit of prep work with some masking tape, and you're ready to go.
I ended up prepping the barrel first with Ballistol and cotton patches to remove any lead buildup first until they came out clean. Then I cut a Swab-It to the proper length and hooked it up to my power drill and worked the paste from back to front in 10 passes. I then re-cleaned the barrel with Ballistol and cotton patches until the bore came out to a mirror finish with no further residue.
This is the end-result of my labor.
Groups in the first three rows are typical BEFORE JB Borepaste at 30 yards. After re-leading the barrel, I re-zero'ed the scope with groups shown below the line. I was amazed at how much more accurate the gun has become! The left-most group in the bottom row was my last 5 shot group and I was super pleased with the end result.
I've turned into a JB Borepaste believer at this point!
