Need to know if any one has tested different velocities for accuracy with jsb redesign for fx impact mk2 especially with A liner.
Best FPS For JSB Redesign in MK2 Impact (Pellet Liner A)
- Thread starter wajie316
- Start date
Can’t say for the pellet liner but out of the slug liner they work great! Tight groups. They are what I plink with when slugs run low. I think they are shooting at 950-60 with my slug tune
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880-890 fps will get you the best accuracy. Much past that, and pellets tend to destabilize in flight and spiral.
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Not true with the 25g RD WPZ, most EBR competitors push them at 950, or faster if possible, I can push them at 1040-ish in my MKII with the 700mm B Liner.
Whilst the 25's do shoot well from the slug liner I have not found the same with the A liner as the breech end is tight and tends to squash them a bit.
Whilst the 25's do shoot well from the slug liner I have not found the same with the A liner as the breech end is tight and tends to squash them a bit.
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IME the B liner is marginally better for pellets, I have a couple of each in 600 & 700 and TBH it's almost impossible to physically tell the difference except for the choke in the slug liner being less, but again TBH unless you want both just going with the slug liner is best way to spend your money.
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I have my reg at 150and my hammer spring maxed out and valve around 3 and I’m not getting near 950. What are your settings.
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You need to make some mods including a c3 bumper, bigger valve seat and elongating the transfer port and pellet probe.
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I have a MKI with 5.8mm valve seat (stock size is 5.5mm), elongated brass transfer port and probe, delrin C3 bumper and 20cc external plenum.
Redesigned Monsters do 1015 fps at 130 bar from the 700mm slug liner and are very accurate inside 50 yds. I haven't tested farther but Edosan uses them in competition at 980 fps.
Pics of the port and probe. Pellet and slug feeding is same as unmodified. Both parts can be purchased new from FX USA if you ever had the need to return to original condition. For warranty work install the unmodified probe and ship the gun without barrel, bottle and magazine.
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They are super accurate at anything below 50 meters using pellet liner A. For me they only do good @90m and beyond at around. 980 ~990 using same liner. Reg @160~165b.
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My Mark II with the "A" liner is shooting 33.95gr MK1 pellets at 866 fps and is quite accurate. I prefer the MK1 to the MK 2s.
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