Recent content by JackHughs

Many, many years ago, I purchased a Unertl block to Weaver mount scope adapter from your friend. I considered his rifle rest as well but I already had two Hart pedestals and couldn't justify the cost. JackHughs

Vintage stuff. Hart pedestal, Sinclair speed screw, genuine Fudd windage top, Edgewood bag. JackHughs

Speaking only to accuracy and precision, this is an important question. Most consumer class Sound Pressure Level Meters can be set for either "slow" or "fast" response. To properly evaluate very short rise time noise, such as gunshots, requires a commercial class meter with "impulse"...

You might try this. Deadhead the output hose. Start the compressor with the bleed screw open. Run the compressor with the bleed screw open for about 30 seconds. Close the bleed screw and see if the compressor will pump higher than 1800 psi. While the compressor is pumping, check the hose...

Lots of good advice here. I suggest the least complicated approach to get started. Talk to the folks at your dive shop about their filling requirements (proper connectors and DOT approved tank) and then buy a 9 liter carbon fibre tank. Use the tank to fill your new M4 but do not consider...

This is not directly responsive to your question but it's the only data I have. Topping off a 9 liter tank with a CS4-i from 200 bar to 300 bar takes 1 hour and 14 minutes. The first 3 minutes pre-pressurize the filter system to 200 BAR. The final 3 minutes the compressor runs at no load to...

HI, Thanks for the info. Yes. I was going for maximum power - but not by choice. The only .22 pellets on hand are the 25.39's. I have some lighter pellets on order for future testing. One of the most interesting discoveries is that the Craftsman Series are "regulated" rifles. Not in the...

Taking a break from my Impact and Panthera, I recently bought a refurbished .22 Kratos from Airgun Revisions. I've always liked the looks of these rifles and saw this as an opportunity to try out a well-reviewed, unregulated rifle at a very attractive price. I did a full power test of several...

What you have pictured is a Lyman Junior Targetspot. These were available in either 8 or 10 power and will focus down to 50 feet. With the mounts spaced at approximately 7.25" each click is .25 MOA. I've owned a number of Lyman, Unertl, and Fecker scopes over the years. All were exceptional...

I have a .22 700 cm Panthera. If you remove the shroud, the POI will change. If you then loosen the two screws on Part No. A12 (Valvetube End), the POI will change again. Try shooting the rifle with the shroud removed and the two screws loosened. And, my Panthera had an out of spec carbon...

As mentioned by others, clean pellets and slugs with Dawn. Dry and very lightly lube with Ballistol. Ballistol will not damage the in-chamber probe seal. JackHughs

OK. I'll post results as time allows. JackHughs

HI, The rifle had a lot of issues to resolve. The regulator died, the valve developed a catastrophic leak, and the high pressure gauge developed a tiny leak that took some time to locate. The barrel liner was plagued with lead fouling. The carbon fiber tube surrounding the barrel liner was...

Hi. The diameter of the scope body (the erector tube?) does not factor into either the Maximum Parallax Error calculation or the Actual Parallax Error calculation. Sensitivity to eye placement is a function of the diameter of the scope's exit pupil. Most quality scopes show the diameter of...

Serendipity. The big brown truck is supposed to bring me a refurbished Benjamin Kratos tomorrow. My plan is to first find the tank pressure for max power and then tether the gun with an external regulator. Anything I learn here will be helpful. JackHughs