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 Post subject: Rifle Balance
PostPosted: Tue Feb 16, 2016 1:07 pm 
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Joined: Sun Nov 30, 2014 8:22 pm
Posts: 286
Location: Hill Spring, Alberta
I learned something new today. It probably isn't new to most, but I thought some low information folks like me might be interested. I did a search but couldn't find a thread about this.

I've been in the habit of routinely doing a lube tune and trigger mod/tune, and also adding weight to the butt stocks of my rifles to move the balance point to just ahead of the trigger.

It has worked well, except for my Crosman Nitro Venom. It was extremely hold sensitive, and I just couldn't get it to group well.

I had tried various other scopes and was almost ready to give up on it but yesterday when I put my heaviest scope on, with no other changes it started to put pellets in the same hole at 25 metres.

I got the lead out of my butt (sorry, I couldn't resist), put the original scope back on, and it's now grouping just fine.

I'm sure that someone here knows the "formula" for balance of an air rifle, but I don't and I guess I was just lucky until it came to the nitro venom.

I'd be really interested to understand more about how the fore and aft balance works.

Peter :D


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 Post subject: Re: Rifle Balance
PostPosted: Tue Feb 16, 2016 4:11 pm 
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Joined: Thu Nov 02, 2006 4:57 pm
Posts: 1754
Location: mb
I've relocated weight on all sorts of air-arms, and never had a hiccup. . . . But I am playing it safe. . . . I've never tried to redistribute a springer. . . .


With springers it's my understanding, that they are balanced using Voo-Doo and Black Magic . . . :mrgreen:

But it sounds like you've already experiencing hints of that! :wink:

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 Post subject: Re: Rifle Balance
PostPosted: Tue Feb 16, 2016 10:12 pm 
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Joined: Mon May 26, 2014 1:08 am
Posts: 480
Location: Thunder Bay
I try to balance my springers so my support hand balances the gun close to the middle of the compression tube when cocked. Can't remember where I read it, but it seems to work.
Sounds like the voodoo is strong in your nitro venom. :D

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 Post subject: Re: Rifle Balance
PostPosted: Wed Feb 17, 2016 5:55 pm 
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Joined: Sun Nov 30, 2014 8:22 pm
Posts: 286
Location: Hill Spring, Alberta
Hmmm. Voodoo huh? :shock:

Kind of ironic, when the reason I feel the need to practice daily is to defend against the coming zombie apocalypse.

Maybe with the strong voodoo in my nitro venom it'll be especially effective. 8)

I'm ready for 'em! :x

Peter :D


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 Post subject: Re: Rifle Balance
PostPosted: Sat Feb 20, 2016 4:41 pm 
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Joined: Sat Jan 25, 2014 9:16 pm
Posts: 1271
Location: United States
As far as balancing I think you should focus your energy so the piston movement has minimal effect on the guns movement. When fired the gun will tilt barrel up, then down, which can sling pellets all over, plus whatever barrel whip it adds. I don't have a high speed camera so I can't say how much barrel whip is reduced once balanced better, which would vary from gun to gun anyway, but balance does help.
Overall gun weight and your hold are much bigger factors imo. Aside from that there are many other factors that affect accuracy, especially with cheaper guns so a perfect balance may have little or no effect. So not voodoo/magic, just a lot of factors and poor quality. I don't even bother with balance, I consider the scope enough and the rest is all those other factors which are much more important and easier to fix.
I'd have to see your gun to decide what I'd do to it, but I think the biggest factor is bore quality which in a chinese gun is poor. I start by sanding the bore, but often a new barrel is a better option.


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 Post subject: Re: Rifle Balance
PostPosted: Sun Feb 21, 2016 8:48 pm 
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Joined: Sun Nov 30, 2014 8:22 pm
Posts: 286
Location: Hill Spring, Alberta
So, it looks like balance is very subjective, depending on the individual gun, and the individual shooter.

Right now my nitro venom is shooting at 940 fps with excellent accuracy using JSB Exact 4.51 pellets from Dan.

I've changed the shape at the front of the fore-stock, refinished the stock, added and removed weight, added little "gritty tape" pads where my right hand little finger and thumb go, and a strip on the rear of the stock so that it can rest ever so lightly on my shoulder, yet have a little stability, and done a lube tune and trigger mod. I also took off the very light plastic muzzle brake (break?) which seems to be only for looks. I thought when I was having accuracy trouble that it might be interfering with the exiting pellets like a bad crown. When I got it off, the crown looks just fine but I haven't put it back on, and I don't miss its sharp edge scraping my hand each time I cock the gun. :shock:

Everything is working really well, but now a .22 caliber barrel I ordered from Rob at R&R is about to arrive so I'll take it all apart again, and start some more fun. It'll be my first high powered .22 rifle and I hope I can make it as accurate as the .177 has become.

Peter :D


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