I plan to install an ARH UK 12lbs kit in an HW98 .177. My goal is for a accuracy. In the past I've used Vortek lubricant, and ARH moly paste and heavy tar to tune a couple of rifles. This time I should have some Krytox lubricant available. Can anyone recommend the the best use of Krytox, moly paste, and tar for this project? I appreciate any help.
Hey Vincent,
Kinda late for me to add my two cents, but I think the tune depends on what tools you have available. Sounds like you bought a kit because you don't have a lathe to fabricate top-hats, spring guides or spacers.
I've always used Molly, but have been curious about using Krytox since many very good tuners use it with excellent results. However, never mix them.
In my tunes, its a labor of love - time and elbow grease mean noting, just the best tune.
I do this: 1.) Polish the barrel using a jag/patch 400 clover and then JB Paste - then wax.
2.) Smooth out the inside, receiver tube on the lathe with 220 paper attached to a rod.
3.) Hit all stamped receiver edges with a Dremel tool and diamond bit to debur.
4.) Remove the barrel locking wedge and spring - polish inside & out, then re-lube with ARH clear Tar.
5.) Usually use an ARH spring only - Grind and Polish ends and outside of spring.
6.) Make a top-hat or Spring Guide on the lathe for a snug fit. Top-hat can be made deeper if added spacing is desired.
7.) Polish the piston and piston tang.
8.) Add ARH buttons on the piston and sand down to get correct piston fit. The button add smoothness at the expense of a few lost fps.
9.) I use OEM piston seals or Australian ones purchased on ebay.
10.) Insert coiled plastic sheet cut from a Smart water bottle to hold the spring in the piston snug.
11.) Use Molly, Heavy Tar and Clear Tar from ARH - minimal use of heavy tar.
12.) Disassemble trigger and polish all contact sears and lube with a combination of Molly mixed with ND motor oil.
13.) After reassembly, see if a coil or two need to be cut or a spacer added to get a balanced shot cycle. Hard to explain how this feels, but when you get it - you'll know.
14.) Fiddle with gun until it's right.
15.) Power and accuracy can both be achieved at once. The more high powered shot cycle .... just isn't docile as a lowered powered one and takes more concentration/consistent hold when shooting. Pushing the guns limits to increase power always ends badly.
