Last week I took my wife for a ride to Cabelas for Valitines Day.Back in the Bargain Cave they had a RWS 350 mag in 177cal with scope and mount for $250.00.The only problem was that someone had bought it,took it home and switched the factory C-mount and Rws scope with a Chinese 3-9x40AO scope and a Accushot mount when they returned it.They knocked it down to $230.00 and I had a $50.00 voucher to spend.I got the whole deal for $190.00.
When I got it home I discoverd it was cocked for who knows how long!Well I shot it over the chrony and 8.6 FTS went at 889fps and 7.9 CPL,s went at 901.I thought I read where others had them going into the 1000,s so I decided to tear it down tonight.This one actually had some grease on the internals but I,m not sure the spring had any.The rear guide was still a nice clean white and no moly on the washer between the spring and guide bottom.I polished the spring ends and the piston skirt and lubed it up right.Still no big difference in FPS.Did the tissue over the breech trick and it tore a big hole in the tissue.I spaced out the breech o-ring and now she shoots FTS at 1047fps andCPL,s at 1075fps.Much better!I,ll be keeping the scope and mount but the rifle will probably go up for sale because I,m a 22cal guy.

spring has definitely still got 'spinach'!

350Ms are a bit more powerful than Webley Tomahawks
when 'healthy'. I had a 'healthy' Tommy .177 that'd
shoot FTS at 980 fps MV and CPLs at 1,020.

Darn good deal!

Herb

That 350 spring sure is pretty strong after being cocked for who knows how long. I could be it was only cocked since that morning or the day before by a customer or a kid behind the counter that doesn't know any better. Goes to show you how good modern springs are. A Diana springer needs to be cocked for several days to a week before showing signs of weakness/loss of power. They are great springs.

John:
Where in PA do you live? I 'm thinking of driving down from upstate NY so you can help me install a spring in my 350 and lube it up. Do you have a spring compressor? I can bring JM lubes and the Arctic spring which I already have. Do you also do debur/polish? I don't have the right tools. I work on my cars so I mostly have mechanic's tools but I can bring screwdrivers I 've never been inside a springer so your help would be greatly appreciated. Mainly I want you to walk me through doing most of it, so I 'll be confident and do the next one myself if I can get a spring compressor. Oh did I mention I 'll bring the beer?

Only problem is I may have to drive through Jersey. Airguns are illegal in NJ and carry the same offense as firearms! NJ laws are the worse.



Diana 350 Mag .22
Hammerli 850 .22
A few Crosman CO2 & Pump .177

The town is called Thomasville.No ,It,s not named after my family!Yes I have a spring compresser(There a must on a 350)and I,d be glad to give you a hand if you don,t mind the trip.

Hea Harry, Gonna take a look inside that 350 of yours you are. What's an arctic spring and what is it supposed to do ?

 hmmm wonder what Arctic is? Here we go again !

Honestly ...no one knows but the man who makes them . Jim Maccarri . Many guesses , but no "right" answers. They're good stuff is what I know about them .


Sorry , I'm no help.