reducing D350 power?

Jump to latest Follow Reply
P

pdxFrank

Guest
I have a Diana 350 magnum break-barrel in .22

It's a little much for #backyardplinking. All I kill is paper. 🎯

I have it listed for sale here, in hopes of using funds from that to get something with a little less punch. No bites, so thought I'd consider alternatives.


What I'm wondering, as much as I like it, maybe I can trim some of the spring off to reduce power?

IMG_2962.JPG
 
You can trim and reflattem the spring to lose some power but depending on how low you're trying to get it you may end up with a REALLY lazy shot cycle. The 350 piston stroke is like 110mm (maybe 115mm from what I just read) so between that and the heavy 28mm piston, going to low could get really screwy in the hold sensitivity/accuracy department.

Do they make an extended piston rod or possibly a piston seal spacer for the Dianas to bring the stroke down some? Just for comparison purposes, my .22 97K is sitting around 17fpe with a 26mm piston and I think an 80ish mm stroke.

Obviously there is a bit more to it than that and I'm not experienced enough to know what will actually happen without actually trying it for myself but I thought it was worth noting the potential issues. Long story short, snip away I think. Worse case scenario it doesn't work out and you need a $20 spring.
 
  • Like
Reactions: SteveV and pdxFrank
Upvote 0
Ya, if you trim do a coil or 2 at a time then you go test that work find thats good or go back and trim another 1 or 2 , repeat till you get to where you need it. I think if a little too much then you can shim up or shim for a finere tune.. at my age and convenient if a detuned spring is availae to just drop in i leave it at that..lol... ( Old and lazy, then hassle).

Edit..
Well looks like you maybe stuck cutting coils on that girl.. id pop hector a email for any unknown advice or tips he'd offer. Then you got a good start point to go with. His diana experience may give you a do it right once thing.

https://www.ctcustomairguns.com/hectors-airgun-blog

Maybe a article in that ..?
 
Last edited:
  • Like
Reactions: pdxFrank
Upvote 0
Mo-Ron said:
Thinking ... You got it up for sale original. So maybe leave it as that , sell it and re buy somthing else? I kind look cocked eye at a used gun that a guy " been in to " and would prefer if all original at a price point.. that looks like a nice like new gun so?
Click to expand...
that was my goal. to find a good trade or get enough in the sale to pick up a new, oh Diana 34 or a Weihrauch HW50.
open-sights, 25Y benchrest target-shooting is my thing. break-barrels 95% of the time.
d350benchrestoct2022a.jpg

it's a really nice gun, i'd not even try to rid myself of it if i needed the power. or if i can cut that power down.
SUPER accurate and awesome T-06 trigger.
 
Upvote 0
For what it's worth, I sent Frank a PM with Hector's personal email addy, which is not something I share publicly, so he could ask about his possible options.

Frank, you might want to reconsider the idea of the HW50 since, if memory serves (it doesn't always...lol), I've read a couple places where LOP on the 50 is the same as the Beeman R9 that gave you problems and you just couldn't get comfortable with. While I have the R9, I don't have the 50 to compare them so someone who does will have to confirm if I actually read the posts I saw about it right.
 
  • Like
Reactions: pdxFrank
Upvote 0
Ya, i guess its down to what you feel is best for you.. if it was a gun i had for a time and well shot and used and just needs spring, seal work maybe id do the coils. Near new like new original?.mmmmmm.... I dont think i could . Its not like that gun been easy to get . Ya these things can be a tough call. Lol..
 
  • Like
Reactions: pdxFrank
Upvote 1
You must log in or register to reply here.
Top Bottom
Back
Home
Forums
Resources
Menu