Vibration of the line of sight

[Lou Cypher]

When I aim at a target with my n°4, I've noted, when I practise some dry release, that the release of the firing pin, pushed by the strong spring, creates a vibration that changed the position of my foresight under the target.
How can I avoid this vibration?

Information

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[Mk VII]

This suggests your trigger pressing technique is at fault. Try more dry firing.

[breakeyp]

Given the nature of firearm designs, there is always some form of "vibration" associated when firing. Barrel jump ---accuracy of grouping at the target and location of the group --- at the target will vary with due to the vibrations generated by the mechanism and the vibrations generated by pushing the bullet down the barrel. Accuracy will improve with minimization of the vibration. It is not going to go away. Try pulling the trigger the same way every time and sight in accordingly. If this becomes a bother, you might consider taking up golf.

[HOOKED ON HISTORY]

If this becomes a bother, you might consider taking up golf.

If easily frustrated I would recommend against that.

[muffett.2008]

Make sure you are not 'Dragging wood', a term used when part of the trigger finger also makes contact with the stock or trigger guard and when pressure to the trigger is applied, it also pushes against the rifle, causing the point of aim to move at the moment of release.

[Bruce_in_Oz]

We could be moving into "voodoo" territory here. Lou Cypher! "Angel Heart" reference?

The wrist if the SMLE butt is designed to be a hand hold for bayonet fighting, not anatomically aligned for slow-fire shooting.

That said, one of the best summaries of "Trigger Release" to be found is Chapter 4 of James Sweet's "Competitive Rifle Shooting".

This chapter covers mechanical fundamentals as well as physiological factors.

It is critical that the trigger be set up to specification; with a clean, two stage pull.

My personal two-bobs worth is that I consistently get better results when I draw the trigger to the rear using the middle joint of my forefinger. Those with small paws may have trouble with this technique.

The other major issue is breathing and holding. When I was a young lad, we were taught to acquire the target, focus on the FRONT sight and breathe naturally. You will see the front sight rising and falling past the aiming mark/bullseye as you breathe.

Then as the "Zen" kicked in, as the sight passed over the aiming mark on an OUTWARDS breath, you gently stopped breathing, confirmed the frontsight position and applied your chosen trigger pressure.

THEN, as the rifle recoiled, you started breathing again and watched to see if the front sight once more traversed the bull. If it didn't, there was every chance that you had pulled the shot wide. Working with a coach / scorer, this "reading" could be used to predict the actual fall of shot with some accuracy. The reason for the poor fall of shot can often be attributed to a combination of poor body position and poor trigger technique. A major problem is to make the trigger finger curl and draw back the trigger without the other fingers also curling and applying a twisting motion to the rifle at the worst possible time.

One final trick to solving the "poor position" problem is to acquire the target and then do the breathing routine with your eyes closed. After four or five slow breaths, open your eyes ans see where the front sight is aligned. Adjust your body and legs left or right and your elbows for elevation, and then repeat.

[Lou Cypher]

I guess that my technique is not to bad .
I'm really speaking about the effect of the spring when it is released.

We could be moving into "voodoo" territory here. Lou Cypher! "Angel Heart" reference?

You're absolutely right Bruce, I like this film and especially when Robert de Niro eats an egg...

[muffett.2008]

Well unless you have some special 303 air rifle, I can say I've never noticed it.

[Peter Laidler]

Lou, To avoid this vibration, I suggest you stop practicing and fretting about stuff that is totally irrelevant and start shooting. If your bullets are hitting where your rifle is aiming, then that's all you need to concern yourself with

[Lou Cypher]

Gents, when I was posting the picture of my target, I wondered why this was not so bad despite "the vibration".
So, I applied some advised read in this post, then I practised today some dry firing (thanks MK VII). I took care of the position of my wrist on the butt, (thanks Bruce in Oz)
I noticed that the "vibration" is noticeable when the firing pin comes forward and create a 'clack' (dry firing), but it is not due to the rifle itself, but to me.
So I'm faulty. Thank you for your advises.