[cajungeo]

I went to the range today after work. I have always heard the 16" barrel length developed the max velocity for a 22 cal. , but have seen some data, indicating this may not be necessarly so. I set up my chrony 3 ft from the muzzle. Shooting same ammo thru 2 new 10/22's, an 18" carbine, and a 22" rifle, all ammo is 40 gr. Each string is 10 shots averaged. Here are the results, so you can draw your own conclusions.
.
CCI Mini Mag - String 1-18" Avg 1241 fps - Std Dev 14.28
....................String 1-22" Avg 1238 fps - Std Dev 19.89

Rem Gld. Pk. - String 2-18" Avg 1142 fps - Std Dev 43.76
.....................String 2-22" Avg 1149 fps - Std Dev 36.95

Win. Super X - String 3-18" Avg 1205 fps - Std Dev 17.60
.....................String 3-22" Avg 1200 fps - Std Dev 13.22

Fed Lightning - String 4-18" Avg 1171 fps - Std Dev 14.89
.....................String 4-22" Avg 1167 fps - Std Dev 13.78

Not much difference huh? I expected more one way or the other. The surprise was the Standard Deviation of the Rem's was the worst! And the Fed Lightning (.99 cents a box) was the best. So my own conclusion, I am leaning toward a GM 20 inch barrel for my long range target 10/22 project, If the hyper velocity ammo shoots well in my rifle the extra 2" may help some, otherwise the extra weight for shooting of a bench rest will help.

 

[LIKTOSHOOT]

Thanks for the info. I assume you are talking about the Remington "Golden Bullet" if so......it is the worst rimfire round on the market.....at least what I have found. One thing about them, is they are consistant.......consistantly BAD!


I imagine if you were to use a 16" barrel, your results would be very close to the same. The .22 case volumn is limited and will have made a complete burn by the time it has reached around 16" and more barrel lenght does not induce a more complete burn. This was also used by the BATF in considering legal barrel lenghts. 16" for rifles and 18" for shotguns. This was flawed logic....but that is what they used. They called it minimum lenght for complete burn, it is at best a joke........much like they`re ridiculious statement....."Serves no sporting purpose."

How about a view for the oldtime longer barrel .22`s and why they were used???? Want my warped opinion??? LTS

 

[New Guy]

Have you looked at the Lilja barrels. They cost more but appear to be worth it for the longer ranges out to 200 yards and further.

 

[cajungeo]

Hi LTS, I have some charts, which appear to be from the ammo manufs, Which indicated that the longer barrel would maximimize the velocity, but after looking it over, especially at the end, they used different guns for the different lengths. I'm thinking the chamber diff in using different brands of rifles, would tend to influence the results? When Bill comes back from vac. we will bump up the attachement file size so we can attach pictures again. I think using only the ruger barrels for my tests would be more accurate.
BTW, what do you think of the Bentz chamber? I have heard they are more versitile, where as the Match chambers tend to be tighter, and shoot better only when using match ammo?
.
Hi new guy, I have heard of the lilja barrels. I think they are used a lot in competition shooting. A very high quality barrel. I haven't decided 100% yet on the barrel, it seems the chamber may make a larger diff, than the barrel length. Will have to research this area more this weekend, also replacing my truck battery

 

[LIKTOSHOOT]

I have never been a fan of match chambers, but they do have their place in competition. They limit the use of ammo, so they limit the rifle`s use. I`m not sure just what a "Bentz" chamber is, as opposed to a regular rimfire chamber. I bring all BC barrel chambers to a mirror finish, before working the bore.....or any aftermarket barrel for that matter. No part, no matter who it comes from.....goes in the rifle unless hand worked first. I did the same thing when in cars. Like I said....I build hunters (10/22`s) to meet the needs of hunters, they must shoot 1" @ 50 yards with most any ammo available, save junk sale ammo and be reliable. They normally preform better than that, but that is the requirement made for a hunter. I do not build any 10/22 around target ammo. I do build around specific ammo, if required, but that requires facing the bolt and some other things. LTS

 

[cajungeo]

I have been looking for the defination of a Bentz chamber, the best I came up with so far, is Shilen barrels offer for a 10/22: LR sporter, LR Bentz, and Lr Match. I sent them an e-mail to define the diff. Just looking, the sporter my be for hunting, accepting a larger variety of ammo, the Match a tight chamber made to get the bullet to the lands, with the bentz being somewhere inbetween. Again don't know for shure yet, but will post when I ge the e-mail.
BTW shilen offers 18 " barrels except for a 20" compensated barrel. They say the friction in the barrel behond the 18" overcomes the velocity from the spent gas. They do offer a 22" for the 77/22 bolt, because (all) the gas goes down the barrel of a bolt gun.

 

[cajungeo]

Here is the E-mail to & from Shielen:
Hi, I wonder if you could help me decide which chamber type I need for the
> 10/22 I am building. I noticed you offer the LR sporter, Bentz, and Match
> chambers. Could you define the difference for me. I am interested in
> building my 10/22 for long range (don't laugh) 200 yds and behond. I would
> mostly shoot target especially at the behond range, but if I could establish
> a consistant grouping at the 200 yds, I would consider taking varmints. (I
> know the wind is a killer at that range). I may experiment with the new
> Hyper velocity ammo to give it a little more umph! out there. If you could
> explain about the different chambers, I would appreciate it. Thanks
> cajungeo

REPLY: Throat length and body diameter is different for each chamber.
We use only the Bentz for auto 's.

Sincerely,
Doug Shilen
Shilen Incorporated