Hold sensitive your thoughts ???

[howie1a]

I was wondering what your thoughts are on correcting a rifle with hold sensitive, My thoughts is to either shorten the barrel so the pellet gets out before the recoil affects the shot,, or lower the power to that of a 500 to 550 FPS like target rifles this way you remove the recoil , or adding power to get the pellet out of the rifle barrel before the recoil. What are your thoughts ??

[Bogey]

Let me think about this for awhile.   Interesting .  I  will get back with you on this .

[mjb108]

Good Question!!  (I have a hard time understanding how a rifle can move so predictably each and every time if we DON'T restrain it in the first place - but that's just my brain's problem, I guess)    Shortening the barrel seems like an obvious first step.  A refresher trip through Cardew's may yield other thoughts.

Lowering the power may work but the philosophical question of whether that is desirable remains....

Mike

[RedFeather]

As I asked elsewhere, what gun? Break barrel? Side cocker?

[howie1a]

It doesn't matter if it is a fixed barrel or a break barrel just so it is a springer, most break barrel guns are as accurate a fixed barrels,today they are just made better that they were. howie

[Bogey]

howie1a - 2/10/2010  8:46 AM

I was wondering what your thoughts are on correcting a rifle with hold sensitive, My thoughts is to either shorten the barrel so the pellet gets out before the recoil affects the shot,, or lower the power to that of a 500 to 550 FPS like target rifles this way you remove the recoil , or adding power to get the pellet out of the rifle barrel before the recoil. What are your thoughts ??

Thoughts on hold sensitivity.   I do believe that a shorter barrel  ( 12 inches VS 18 inches)  is potentially more accurate due to the fact that it is stiffer than a factory length barrel.  Even though without special equipment it would be difficult to measure.   Is barrel length of 18 inches that important in an airgun compared to a say .22 LR.  Doubt it, as there are no burning material ( powder )  produceing gasses pushing against resistance, ie the bullet.  AG power is a burst of air, that is not inclined to expand significantly.

A moderate fps may help, less mechanical movements within  the action.    I think using a pellet  with a greater length is more accurate than a short pellet.
I have found that keeping the butt of the AG firm against my shoulder gives me better groups.  This verses a weak hold.  As far as grip on the fore stock,  I keep it behind the fasteners.

Of course this is only my thoughts on the matter and some stuff I have noticed with my tinkering.  I am quite sure others have experiences that may well be totally opposite from mine.

[normal]

The way most of my springers are more hold sensitive some days than others makes me think the biggest variable is me.  The more pressure I apply with hands, shoulder, cheek, or rest, the more trouble I have.  We might could use an anti gravity stock design.

[fisherdude]

Hold sensitivity is caused by recoil, torque and vibration.  It is an inherent issue with springers.  Anything you can do to reduce vibration/torque should help.

1.  A good tune will help if you haven't already done that.
2. Shortening the barrell may help reduce barrell whip and let the pellet out faster.
3. A barrell weight may help and this is about the easiest thing to try.
4. More overall weight may help. I put Blue Ice in my synthetic stock to add weight and absorb vibration.
5. Detuning the rifle may help but I personally wouldn't want to do that.  If I wanted less velocity, I would probably get a different rifle.
6. Make sure the screws holding the action are tight - lock tite if necessary
7. If your barrell slides around in the stock due to poor inletting, do some  bedding of the barrell and action.  I have had this work wonders on my chinese rifles.

[kiwi]

You are not going to get the pellet out before the recoil...
the recoil efect starts before the pellet starts to move...
The instance the spring is released the recoil efect is put in motion..

Most of the recoil is from the weight of the moveing mas
" piston / top hat / spring...Reduce the spring pre load & OR...
lighten the weight of the moveing componets...

Shorting the barrel will help....get the pellet out sooner so the recoil
/ barrel rise has less time to efect it....AS long as the barrels NOT chocked

My .177 kral I lightened the top hat by 20grams....VERY
smooth...but a big power drop...Now I have added 25grams over the
weight of the standard top hat....very harsh recoil...but way more power
than it was in standard form....
And it has a 13" barrel...

Pete

[LongIslandArcher]

Not entirely true that the only power supplied to a pellet is compressed air; sometimes, you'll get dieseling from any lubricants that are in the compression chamber, on the pellet or in the barrel.  Some air rifle manufacturers actually tell you to add a specific type of oil in the compression chamber for controlled dieseling so you get more speed from the pellet.

As for shortening the barrel length, you'll lose a lot of speed if you do.  The longer the pellet stays in the barrel, the faster it'll come out of the muzzle, because a longer barrel utilizes more of the compressed air to propel the pellet.  If the pellet leaves the barrel too soon, it'll waste a lot of the air that's pushing it.

[leadbottom]

A smooth firing action usually makes the gun less hold-sensitive, besides what's already mentioned.

[Bogey]

KIWI is correct regarding the pellet leaving the barrel before the recoil  caused by the moving mass within the compression tube.

And I don't know why I left out a good trigger.   If anyone with a 50lb trigger can get decent groups,  I want to shake thier hand.

Main problem with spring powered AGs is that there are so many things happening at nearly the same moment.