The Sumo

[sgeorge]

On to barrel cleaning. Yes, I know my method does not follow typical air rifle logic. It is based on nothing but my extremely limited experience. At approximately 100 pellets, a cleaning is done. Pull through patches with a bit of Prolix or TSI 301. 3 patches and things are beautiful. A fourth patch with some alcohol and boron nitride powder mixed in as a final treatment. About 2-3 pellets gets things back into the 10 ring.

My next request to a barrel manufacturer is to do a final lap finer than the normal 360 grit.

 

[Pete Wass]

On to barrel cleaning. Yes, I know my method does not follow typical air rifle logic. It is based on nothing but my extremely limited experience. At approximately 100 pellets, a cleaning is done. Pull through patches with a bit of Prolix or TSI 301. 3 patches and things are beautiful. A fourth patch with some alcohol and boron nitride powder mixed in as a final treatment. About 2-3 pellets gets things back into the 10 ring.

My next request to a barrel manufacturer is to do a final lap finer than the normal 360 grit.

A suggestion Steve,

Get a Lapping Kit from Brownell's and lap it yourself. A friend of mine has been able to make some sorry shooting RF barrels shoot well with just using JB. I have some 1200 non-imbedding compound a friend gave me and it work the very best, a bit faster than JB.

Regarding barrel prep; it occured to me today as I was driving along that if RF barrels rely on a coating of the lube on the bullets one is shooting, to shoot their best. Why wouldn't the same apply to Airguns? Don't know how much lube those little pellets can take but there is a considerable amount on RF bullets and there is a considerable thickness of wax lain down on the inside of RF barrels. Just something to think about is all.

 

[RIng]

Hi All My hope with my Sumo was that I could get it seat up for both 35 ft/lb and 50 ft/lb . I have chips Sumo and a 22 Kreiger with Dane B. reg . It shoat real well at 35 ft/lb with 18.1 JSB with 1800 psi on the reg.. I turned the reg up to 2000 psi today . I now can go from 18.1 JSB at 35 ft/lb to 21.3 Baracuda at 47 - 48 ft/lb or JSB 25.4 at 50 or more ft/lb with the same hammer spring . The Baracudas looked real good and the JSB looked good at 25M . I have a lot of work to do , and may go with a hammer spring switch , to move from 35 ft.lb. to 50 ft.lb. I well have to shoot a number of shot strings to see witch is best . I know it well work out now , and hope to try the Kreiger and one of my Benchmarks with cast .22 bullets at a later date .

 

[Dave Shattuck]

On to barrel cleaning. Yes, I know my method does not follow typical air rifle logic. It is based on nothing but my extremely limited experience. At approximately 100 pellets, a cleaning is done. Pull through patches with a bit of Prolix or TSI 301. 3 patches and things are beautiful. A fourth patch with some alcohol and boron nitride powder mixed in as a final treatment. About 2-3 pellets gets things back into the 10 ring.

My next request to a barrel manufacturer is to do a final lap finer than the normal 360 grit.

Steve,

Doesn't that Prolix work great! I've been using it for the past year on both my rimfires and air guns. 2 wet, with the second looking as clean after as it did before, 3 dry, then back to shooting with a very quick return to accuracy.

Dave