Pressure point on the barrel from the forend- accuracy

[fgregorio]

Hi everyone,
I'll be experimenting with a delrin shim stuck between the barrel and the forend to create an upward pressure point on the barrel of about between 8-10 pounds.

Hopefully it will increase accuracy by making the forward section vibrate at a higher frequency with less amplitude.

By tapping the barrel and recording the sound in order to compare it, shim-on vibrates at a markedly higher frequency.

Has anyone had any experiences with this shim procedure?

The rifle is a palma .308 30 inch medium palma profile.
The stock is a very solid aircraft duraluminium design.

 

[M14AMU]

Does it have a spinning reel fitting attached?? ;D

 

[fgregorio]

Mmmmm... that's an idea It
's longer than some fishing rods that I've seen.

 

[Dusty Stevens]

Remington tried adj pressure points on 40x stocks but quickly abandoned it when they realized how bad they shot.

 

[mac86951]

Agreed. To variable as barrel temperature changes.

-Mac

 

[Eric Leonard]

how big is your front iris,,1/2 inch,,or do you just take the inserts out and use a 22mm globe,,my smallbore has a 28 inch barrel and I tried a 6 inch tube and couldnt find an insert big enough for the 18mm globe to see any white on the TQ4 at 100 yards,,

 

[bdale]

There was an article some years ago about this very thing , some one put a derlin screw in the bottom of the forend that could be screwed upward against the barrel, the pressure could be adjusted by how much you turned the screw, as I remember it worked rather well. Maybe the Forum Boss could help locate the article.

 

[JRS]

fgregorio:

www.stocks-rifle.com/barrel-movement.htm

 

[Big Mc]

I have seen it used on a Win 52D 22 rimfire, but never on a big gun.

 

[Eric Leonard]

my Brno Model 4 22LR has a lug on the barrel at the front swivel stud that has a spring tension that pulls down on the barrel instead of pushing up and I have tested it with Tenex and Midas Plus and cant tell any difference how it shoots at any setting,,

 

[Alex Wheeler]

Hi everyone,
I'll be experimenting with a delrin shim stuck between the barrel and the forend to create an upward pressure point on the barrel of about between 8-10 pounds.

Hopefully it will increase accuracy by making the forward section vibrate at a higher frequency with less amplitude.
By tapping the barrel and recording the sound in order to compare it, shim-on vibrates at a markedly higher frequency.

Has anyone had any experiences with this shim procedure?

The rifle is a palma .308 30 inch medium palma profile.
The stock is a very solid aircraft duraluminium design.

That it will definately do. Increase accuracy? I doubt it.

 

[K22]

I have several Remington 700's and a few Model 7's. None of them shot very well with the pressure points installed on the factory stocks. Once I removed the pressure points ALL shot better, some considerably better.

Almost all manufacturer's now supply their rifles with free floated barrels. My Tikka's, Browning A and X Bolts all have free floated barrels.

 

[OrdellRobbie]

I have no experience with pressure points on the forend however every time I bed an action my grandfather tells me to put a pad at the front of the forend and then adjust with business cards. I have yet to try this.

I saw this video a while back and found it again. Don't know if they are still in business but they might have some tips for u to try. They sell or sold a smart stock with adjustments. Don't know anything about them besides this.

http://m.youtube.com/watch?v=wku1APH2CK4

Personally I think it might work for one load but make things worse should you choose to use another load without tuning.

Oh and here is the smart stock website. http://www.stocks-rifle.com/smartstock.htm

 

[BigBlueandGoldie]

I think Weatherby still uses pressure pads in some of their hunting rifles. To be honest though, I can't imagine trying to get consistent harmonics with how long your setup is.

 

[K22]

I think Weatherby still uses pressure pads in some of their hunting rifles. To be honest though, I can't imagine trying to get consistent harmonics with how long your setup is.

My Super Varmint Master Mark V (no longer made) has a pressure pad several inches back from the end of the forearm. However this rifle shoots 1/4 moa groups so I never messed with it. This rifle has a heavy No. 5 contour, 26" long barrel.

 

[fgregorio]

I'm just curious from an experimental point of view. You never know, it might work in these circumstances...
Anyways, I'll be trying it hopefully this saturday, weather permitting.
In the meantime I'll leave you all this video.
It kind of reminds me of my mindset in my early attempts at reloading
https://www.youtube.com/watch?v=qNGGlPIBZ6c

https://www.youtube.com/watch?v=qNGGlPIBZ6c

Enjoy

 

[wolley]

You might see a benefit if the rifle is shot from a machine rest. Knowing that it will be shot from a sling my intuition is that sling pressure will have a negative effect on precision once you connect the barrel to the end of the stock where the sling swivel is.
Try it and let us know.
I shoot a lot of milsurps and they all shot better with forend pressure. However, better is a relative term and when talking battle rifles it still isn't very good.

 

[Raythemanroe]

The idea of pressure points, How does temp and humidity effect pressures?


Ray

 

[bdale]

I'm just curious from an experimental point of view. You never know, it might work in these circumstances...
Anyways, I'll be trying it hopefully this saturday, weather permitting.
In the meantime I'll leave you all this video.
It kind of reminds me of my mindset in my early attempts at reloading
https://www.youtube.com/watch?v=qNGGlPIBZ6c

https://www.youtube.com/watch?v=qNGGlPIBZ6c

Enjoy

LMAO

 

[Ggmac]

Remington 40x , winchester 52 , Stevens 416 just a few that use adjustable press points .