Scope Jump When Dry Firing

[number40Fan]

How does scope jump,when dry firing) effect the POI when under normal firing conditions?

Is there any way to fix it?

Savage action with a Leo MK IV scope.

If this isn't the right section for this question, feel free to move to proper section.

 

[scout1]

Reticule jump is what you are referring to if I'm not mistaken. This is not good. If your scope has a warranty have it refurbished. Or you could go to a lighter firing pin & spring as well as having the sear engagement surface pollished to reduce drag. Either way I would worry about the tracking and repeatability of a scope with a jummpy reticule.

Hope this helps, Scout1

 

[JHardy]

The type of jump you describe is usually a function of your front bag being filled to tight and hard. There has been a lot written about this and I believe Speedy addresed the issue in the archives somewhere.

This type of jump on the bag is one of the things that can present vertical at the target at convention ranges of 100/200 or 1000 yards.

If it is your scope, that is another issue.

Good shooting,
Jim Hardy

 

[Ogre6br]

the eraser off the back of a pencil makes a good primer hole filler

are you sure it's not you

get setup and then put a coun right on top of your barrel up near the muzzle

if when dry firing you make the coin fall off - suggests that you are affecting the rifle in some way as part of your followthrough

the smaller the coin the harder the test

later
p

 

[Taildrag15X]

Don't forget to check the base and rings, my base was loose and I blamed every thing but that, the very last thing I checked.

 

[number40Fan]

First thought was something was loose. Gave it good over all tightening check, and everything was GTG. Second thought was it was me. The trigger is adjusted to 6 ounces, so without touching the stock, I pulled the trigger and noticed the same jump. BTW, this is quite a heavy gun...need to weigh it so I can give an accurate weight though, but I would say close to 13 lbs scoped.

I did put the scope on other gun that weighs 15 lbs,without scope) and notice the same jump.

My front rest bag is filled pretty tight, so that might just be the fix. I'll remove some of the filler and see what happens and get back. If that doesn't fix the problem, I'll send the scope back and see what they say.

 

[Travelor]

You did not tell us what rifle/stock you are referring to. It could be the inertia cased by the firing pin that you are seeing.

Tell us the gun and we'll go from there.

 

[SlowpokeRodriguez]

The type of jump you describe is usually a function of your front bag being filled to tight and hard. There has been a lot written about this and I believe Speedy addresed the issue in the archives somewhere.

This type of jump on the bag is one of the things that can present vertical at the target at convention ranges of 100/200 or 1000 yards.

If it is your scope, that is another issue.

Good shooting,
Jim Hardy

Jim---you are correct! This is one of the first things that Speedy taught me when shooting. Set the rifle up in the bags correctly and there will be no jump---I always check when getting ready to shoot..

 

[number40Fan]

Got to thinking today. Is there a better media to use in the bag other than sand?

Gun configuration is a Savage 110 with a wood stock that has been heavily modified to act as a benchrest stock. It has been bedded, floated, you name it...

 

[PeterNBiddle]

I mostly shoot prone. When I go to the range I always dryfire a minimum of 20 shots or so and always until the reticle doesn't jump at all.

That's when I know that I'm as solid as I can get, also helps teach my muscles that the gun frequently doesn't go bang.

 

[nadams800]

All my Savage Target actions give slight jump and trigger set at 9 oz. Dry firing off a rest with a sand filled bag. Maybe too full.
What about shooting using a bipood? Will jump still happen?
Comments please.
Thanks

 

[JERRYHM]

Hey,
What is wrong with a jump when dry firing??
Most BR rifle have such weak firing pin springs I'm surprised that they fire at all.,some don't).
My rifle jumps clear out of the front bag when I fire it.
IS that BAD??
Jerry

 

[mason]

I have a front rest that is about 21 pounds and i found bird seed works the best for me,been using it for years never a problem yet.

One thing, i use a 3' bag block cause the bag with bird seed doesn't like to keep its shape..

 

[BoydAllen]

Does it jump when dry fired on a fired case with the fired primer still in it?

 

[number40Fan]

I haven't shot this rifle in a while, but next time that I do, I'll try with a fired case in the chamber.

 

[AlanPF]

Does it jump when dry fired on a fired case with the fired primer still in it?

You are right on the money Boyd. I once noticed a significant jump with my Barnard actioned rifle when dry firing - it was due I believe to the bolt rotating slightly and knocking on the action as the trigger releases. However when using an empty case with spent primer, the bolt is held more firmly, and the jump problem disappears.

Alan

 

[ericskennard]

try a good quality snap cap that absorbs the shock of the firing pin. Lots of shooters who use computer shooting trainers attached to their muzzles use snap caps to keep the muzzle from jumping.

I carry these in target rifle calibers.

ericskennard@msn.com