[cajungeo]

First let me wish everyone a Happy, and Prosperous New 2003!

I went to the range today to try the K-mart Dynapoints. Now I did not take my sorted ammo only the bulk stuff. Results at 50 yds. 4 groups of 5 shots avg .96" Best group .6".

Then I put a couple of cardboard shims under barrel: 6 groups of 5 shots avg. .632". Best group .333". Then I fired at 100 yds: 1 group of 4 = .460" with a flyer opening group to 1.50". Then the wind got up to 6 mph at 4:00, and subsequent group opened to 2.12". Wind is a Huge factor with .22LR.

I visited the Bug Tuner site, it is closed. I hesitate to install a pressure pad, at this point as the ammo I am going to use is not locked in yet. The pads are for a specific ammo. I bet I can design an adjustable tuner. If I can survive the holidays down heah!

This photo is first group of 5 fired at 100 yds with unsorted K-mart Dynapoints.

 

[TheGermanGuy]

Hey Cajun!

The cardboardshims seemed to have really made a difference in you accuracy, but what is the purpose of them? Reduction of barrel vibration? And if you shim your barrel, is it still considered a "free floating" barrel? This is all AFTER you've already bedded your action, right?

TheGermanGuy :sniper:

 

[cajungeo]

Very good question Germanguy. I bedded the first 3 inches of the barrel, to support the heavy Stainless bull barrel, in an aluminum receiver. I free floated the barrel to rid any extrainus forces being exerted on the barrel. The barrel still whips inspite of being .920" of Stainless Steel, (barrel harmonics). The pressure pad helped stabilize the barrel. It is ok for a barrel to whip, as long as it whips the exact same each shot. The pressue pad just reduces the excessive amounts, i.e. dampens it. Different ammo will produce different harmonics, so the target shooter is faced with using a pressure pad for a specific match ammo or using an adjustable pressure tuner to tune the harmonics to match each ammo. I have spent many hours researching this phenomina. I will go with the adjustable tunner, as my ammo may switch. If one finds the ammo he will stick with he can loosen the forestock screw, and place buisiness card layers in the forstock to find the "sweet spot, and thickness" Then measure shims, and bed or bond in a perment shim same thickness, and location.

I don't have a digital camera, but I plan to take some pictures of the bedding, and the completed project. Will take 35mm, and have walmart develop on a flopy. Maby they will be sharper than the scanned pictures.

 

[TheGermanGuy]

Do you feel that bedding your 10/22 made any difference, or did you never shoot it before you bedded it. Also, how would one find the sweet spot, and figure out the right thickness? I have not bedded mine (yet), but I'm thinking about it.

TheGermanGuy :sniper:

 

[cajungeo]

I didn't fire my new target barrel before bedding. I did on my mini-14. It got rid of 3" flyers, and tightened average groupage by 3/4" at 100 yds. The sweet spot seems to be about 2" from the forestock end, and the amount of pressure is found by experminting. It will change with different types of ammo. Thats why I favor an adjustable tunner such as the "Bug Tunner". Here are some links dealing with the subject, but I must warn you on the last one, do not look at unless you are serious, or it will hurt the brain!
http://www.varminthunters.com/tech/1022bedding.html
http://www.rifle-accuracy.com/harmonics.htm
http://www.cybersniper.com/balisticus.htm
http://www.vni.com/books/appstudies/rifle/rifle3.html

 

[fastang50]

What brand of scope and mount system are you using on that one? Those groups seem really good, espically for cheapo ammo.

 

[cajungeo]

Good question fastang. I have been using a 6-24x44mm tasco worldclass target scope. The mount I was using is the cheep std dove tail, and $5 tasco rings. I do not recommend the mount/ring set up I used. I am ordering a weaver T0-9 mount $4, and Burris signature zee rings with eccentric .005" to .020" insert kit so I can ramp the scope for more elevation.

After that 100 yd group I took my rifle apart to take pictures of , and use the rings on my other rifle, the front ring had worked loose, and the rear one had almost slid off. It's a miricle The group was as good as it was. The weaver type mount, and rings will "Lock" the scope in place.

I also made a rim thickness guage, and am sorting the Dynapoints by rimthickness, and wt. to see if this will make it more consistant, as I mentioned in the other Make Match ammo post.

Will post some pictures soon.

 

[fastang50]

Where did you find the weaver mount for $4? I see a couple in the Midway catalog but they're $14-24.

 

[Coyote]

cajungeo

Thats a pretty good group. I took my 10/22 out and tried it at 200 yards as we talked about. Shot at one of those 8" shoot and see targets. Hummmmmmmmmmm....out of 50 rounds never hit the dang target once. Course with a 40 mile per hour wind blowing, was hard to judge where to hold the sight.

(Well, that excuse sound pretty good anyhow)

 

[cajungeo]

Hey fastang. Here are some links for the Weaver T0-9s mount.
http://www.midwayusa.com/rewriteaproduct/212505
Natchez = $4.37
Midsouth Shooter Supply = $4.35 (bad picture but cheapest price)

Hey Coyote. Im still tuning my rifle, but can hardly wait to start shooting 200, 300 or more yds to see how it goes.

 

[Coyote]

cajungeo
I am sure I missed this somewhere down the line, but please describe the weapon that your using and what you have done to trick it out.
Thnanks.......errr. thannnk.......errr....awww hell

good show......

 

[cajungeo]

I am posting a picture on a new thread "Mini Palma Rifle"

 

[TheGermanGuy]

Ok. Went to the range today with 8 different kinds of ammo. Weather conditions were pretty poor. Temperatures in the low 50s, wind between 10 and 20 mph. Because of that I scratched the idea of the 100 yard test. Still proceeded to try and get at least some results @ 50 yards, but I must admit I did pretty poorly. Each ammo was shot in 10 shot groups. So here it goes:

Federal Classic High Velocity, 40 grain solid, Federal#810: 1 1/8"
Federal Lightning High Velocity, 40 grain solid, Federal#510: 5/8"
Federal Gold Medal Target, 40 grain solid, Federal#711B: 9/16"
Federal Gold Medal Match, 40 grain solid, Federal#900B: 11/16"
Federal Gold Medal UltraMatch, 40 grain solid, Federal#UM1: 1/2"
RWS Rifle Match, 40 grain solid: 11/16"
Winchester Super X, 40 grain solid, Winchester#XT22LR: 7/8"
Winchester Super X, 40 grain Hollow Point, Winchester#X22LRPP: 1"

Hope this was of help and/or interest.

TheGermanGuy :sniper:

 

[TheGermanGuy]

Oh! I'm hoping to do this again with better weatherconditions.

TheGermanGuy :sniper:

 

[cajungeo]

Hey GermanGuy, that wasn't a lot different than my first set of groups, especially considering the wind. As you know 10-20 mph is a killer for the little bullets. Once you find what shoots best in your rifle, try the shims under the barrel. Is your barrel free floated? You were also shooting 10 shot groups, as most people do with the 10/22. I was shooting 5 shot groups. 10 shot groups will open up over 5 shots.

 

[TheGermanGuy]

Hey Cajun!

Yes, my barrel is free floated and I still haven't done any bedding. Neither has the overtravel stop been done. I should do both before I go back to the range. That way I might actually see some improvement.

TheGermanGuy :sniper: