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See, that’s the problem I‘m faced with. I have found the 34 grainers that I shoot like it at 945-950 but as soon as I start shooting in the colder temps the velocity slows down to 920-925 and the groups are horrible, very fussy!!

Hi guys, I know most of you guys are in the middle of summer but some of us in the southern hemisphere are freezing our a$#&* off right now! Anyway, I was wondering if anyone had any tips for tuning during the winter months. The cold weather really slows everything down. Do you guys re tune...

Benjamin Discovery .22 for me. Excellent memories!!

Thanks so much Matt, I’ll take a good look at it and start playing around with different stacks! Lucas

Hi Matt, what would “move over to peak” mean or imply? I’ll try alternate stacking configurations, any ideas? I have it stacked the way Huma suggests in their instruction manual. Should I invert it first? I’ll try to do this next time I take the gun apart so you might get a message out of...

So, Jason and Matt, I polished up the reg a bit, did not polish the inner (screwing part) because when I started to pull it out I felt a lot of resistance so I was afraid of damaging an oring. I did polish up with 3000 grit the bottom and sides of the piston and bottom and sides of the reg. I...

Thanks Matt!

I can’t thank you enough!! I’ll try all out tomorrow, I already have the reg out! Saludos, L

Thanks! What would be ways to fix it?

Thanks so much!! L

Thanks for your reply, I understand that the change is only around 15fps, what I’d like to know is why is my reg pressure dropping consistently as I shoot? Is it the reg? Is there a possible leak somewhere? I have a Wildcat, its reg is set to 130Bar and it is extremely consistent going back to...

I’m bugging you guys once again from Patagonia, Argentina with a couple more issues on my Impact MK2. I am getting a drop in reg pressure of about 10-13 Bar over a 50 shot string. I have a MK2 .25 with Power Block and 72 Power Plenum Upgrade, slug kit. Shooting 34 grain slugs at 945fps...

I understand, I took it out 2 times and measured 6mm on it and it wasn’t until I screwed it in that the velocities started to climb. After switching the hammer weight I forgot to measure, what I did was started to back it up until the velocities didn’t climb anymore, that way I assumed it...

I was using a 13g hammer, switched to a 12gram.

My advice would be to save a few more and buy off a reputable seller, wether used or new. I bought a used Impact MK2, the seller told me it was in top notch condition and after a couple of tins of shooting it started to crumble, the rifle was far from ”top notch” condition! I had to replace...

Thanks so much!

Guys, I changed the hammer weight to the lightest of the Huma pair, then slowly crept up the Reg Pressure and voila, it worked like a charm so thanks to everybody for their suggestions. I do have a couple of questions, do I need to dial down the hammer spring tension about 10fps in order to get...

Hi, yes, I’m aware of the reading, learned the hard way though! I did exactly what you suggested and I’m getting the highest velocities right off the bat, as I dial back the velocities decrease instead of increase. L

Thanks, I’ll keep those numbers in mind. I’m not having troubles finding my speeds, I just want to have the whole ”range“ possible. Im getting the speeds on dial #5 or #6 but can’t find the highest speeds at #7. I only reach high speeds when the adjustment dial is all the way “in” instead of...

I have the hammer adjustment setting all the way down, that’s when I’m getting my highest speeds, I can’t back it off any more and whenever I put hammer on, the speed drops. In other words, the system is working backwards for me. L