Highest velocity in short barrel?

[BEN BRAND]

Morning Gents
I hope someone could help me, what calibre (case) will give the highest velocity in say 22"barrel length in .224 or 6mm calibre? Iwant a short rifle that is easy to manuvre in thight spots and if i have to shoot long range it must still be capeble to at least 600 meters and extremly accurate
I have just build a 22-250ai with a 28" barrel it is a very nice longrange rifle but a pain to manuvre for the rifle is in total 55" long and it weights 7.2 kilograms. So i think i will use it only for prone in competitions, no hunting with this rifle it is just to heavy.

regards
Ben.

 

[bheadboy]

if you are intending to use primarily hunting, then 7-08AI, i have recently built on weigh is 7 1/4 llb, with scope, 24" #3Hart bbl, 700 sa trued, Hightech stk, shoots in the .300's and pushes 140's Nosler bt and Sierra sbt at 3024fps,

i would think 2 inch less bbl will give up maybe 50 fps and you have a grand rig.

Bob

 

[284driver]

I would go with a straight 243. Still plenty fast and accurate out of shorter barrels. I have a 6br finished at 22" and it pushed 95 Berger Vld's at over 2600 and I had room to go. The 243 will go faster. Plus no fire forming.

 

[Turbulent Turtle]

Morning Gents
I hope someone could help me, what calibre (case) will give the highest velocity in say 22"barrel length in .224 or 6mm calibre? Iwant a short rifle that is easy to manuvre in thight spots and if i have to shoot long range it must still be capeble to at least 600 meters and extremly accurate
I have just build a 22-250ai with a 28" barrel it is a very nice longrange rifle but a pain to manuvre for the rifle is in total 55" long and it weights 7.2 kilograms. So i think i will use it only for prone in competitions, no hunting with this rifle it is just to heavy.

regards
Ben.

Wow. 55inches with a 28 inch barrel? My 32 inch barreled rifle measures 52 inches and that's with the extended butt plate.

So, why are you looking for the highest velocity above everything else?

 

[MK 19]

Velocity is nothing but a number in a hunting rig, put a quality bullet where it belongs and you'll have little to worry about. But if you really want high velocity take a look at the 6mm Remington AI or the 6mm WSM

 

[BEN BRAND]

This weekend i broke the rifle in parts and weigh the rifle parts, the barrel28" and action is 3.8kg that is more than half the weight of the complete rifle, a shorter barrel will handel better and i think the balance will be beter, reason, silencer up front.
Maybe i did not put my words right ,the longer the barrel the higher the speed, so i was wondering for instance the 6br and 6 dasher perform quit well with a 20" barrel but other calibers need longer barrels to perform the same?

In short i want a short or compact rifle that can perform in competition, longrange max 600m and hunting.
My appology , MK19 your dead right accuraccy should be number one. Thanks to all the members that responded.

Ben.

 

[284driver]

still voting for the 243. Feeding issues may arise from the short cartridges like the br.

 

[Turbulent Turtle]

I hate to be continually asking questions, but one can throw out calibers (or calibres) and not really address the issue.

What kind of competition?
What type of hunting?
Do you handload?

I am not a fan of dual purpose rifles; hunting and competitions. Usually, the compromises make for a poor performer at both intended tasks. A "long range" competition rifle is better equipped with a long heavy barrel, much like the one you currently have. The 22-250 usually has a slow rate of twist which prevents you from using the longer, heavier, higher BC bullets that are needed past 400-500 yards. A fast-twisted .223 will do a much better job at the longer ranges, topped with 75 or 80 gr bullets.

On the other hand depending of what you will be hunting and how, a fast-twisted .223 will simply not be sufficient and a 6mm or bigger is called for, so a .243 or some form of 6mm BR might be better. What are people using in the competitions you are contemplating?

 

[BEN BRAND]

Hello Bayou shooter, the problem in South-Africa is the gun laws it is very strick. Unless u have an extreme good reason you can have more than one calibre in the same calibre. I really envy you in the states some of the hunters have ten or more of the same calibre, then one can tailor make the rifle for every shooting dissipline.So unfortunatelly i have to make my rifle to work in more than one application. And yes i agree that is not the best cenario.
The competitions i compete in is all based in hunting situations, some there is a time limit other is prone shooting at 300m . You have to compete in any position.And then lately i started shooting f-class open i am still a beginner but i like it alot , i am currently building a 6.5x47l.
I am a serious reloader.

So I let the rifle smith set the barrel back at 22" becaus up to 300m the trajectory is very simular. On the other hand yes i am gonna loose some speed but i think the rifle will stil perform great with the 75gr a-max up to 600m.

The reason why my rifle is longer than your is the silencer.

Sorry for all the spelling mistakes.

Have a nice day.
Ben.

 

[Turbulent Turtle]

I was wondering if you were in a locality where there are legal reasons for keeping the number of rifles down or pressing a rifle into multiple roles. But I was too lazy to ask. Thanks for clearing that up.

Your English spelling is fine, certainly better than what I could write in Afrikaans.

Since you handload, pretty much any caliber mentioned earlier and some of their variations would be proper for you, but I'm not sure if there are laws against using "military" calibers such as 5.56 or 7.62 NATO. The 6mm are definitely something to consider if the distances do not exceed 600m. But since you are talking about using the 75 A-Max, I'm guessing you are going .223 Rem. In a 22 inch barrel it will do fine to 600m, just make sure you have a 1:8 twist of faster in the barrel.

 

[bheadboy]

with the info you have provided, i change my thoughts, the 7-08AI is a great round but in light of your target as well as hunting use, i think the big question becomes, what animals would you be using the rifle for? "target" cartridges for the range you mention are numerous. hunting rounds vary greatly depending on the tuffness of the animals you may encounter. soooo - what hunting use?

that is the question that may divide the 224, 6mm and 7mm cartridges as you have indicted you are building a 6.5 47l

Bob

 

[BEN BRAND]

All plains game in South-Africa

regards
Ben.

 

[bheadboy]

Ben,

i think you are a better judge of this than me as i have never hunted plains game, however with the risk of being wrong,
considering the larger and varied species, i would not consider anything less than 6.5 and 140's in the 2700fps range,

actually i would go to a bit heavier 7mm in the 2900+ fps for 140's and 150's 2800+ ----this means a minimum of 7-08 / 7-08ai 7x57 etc.

a 140 7mm sierra sbt at 2900 will have about 1700fp at 300yd and 1275fp at 500 -easy in a 7-08/7-08ai
a 140 6.5 sierra sbt at 2700 wil have about 1575fp at 300 and 1225 at 500 - about it in 260 rem
these are considering the 22" bbl you are wanting to use

the target part of your shooting would lean toward the 7-08 etc.
Wboggs who post here is very experienced in this area, hope he will chime in on your question
you may send him a pm.

your call.

Bob