What does AMU/MTU mean?

sinister

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Re: What does AMU/MTU mean?

Trivia:

NRA Long Range Highpower (prone) rules state a rifle must be .33 caliber or less with no muzzle brake.

To get a .30 caliber bullet to 1,000 yards and consistently print into the X and 10-rings of an NRA-LR target (judging winds yourself without a coach's assistance) requires a fairly thick barrel and heavy bullet that won't heat up and give god-awful mirage; shift from zero; and still be able to stack 22 rounds into the same place in a time span of 22-odd minutes.

The .300 Winchester Magnum, 30-338, and 308 Norma required a heavy, beefy barrel. The heavier AMU and MTU team rifles were extremely consistent and helped suck up recoil but are impractical for combat movement over terrain (a la the Marines' latest M40 variant).

Converting to the 6.5x284 "Fag Mag" (which can shoot inside a .300 Win Mag and not abuse you -- at the cost of barrel throat life) turned the trend back to light and mid-weight Palma taper barrels.

An AMU/MTU barrel is much thicker and heavier (kinda like a tractor axle) than most generally need in a full-on combat weapon if the user has a muzzle brake or suppressor.
 

Graham

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Re: What does AMU/MTU mean?

Good point about the prohibitive weight. I like a medium or Heavy Palma on a match rifle. Any rifle I have to carry over long distances should, ideally, be made out of balsa wood.
 

Lowlight

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Re: What does AMU/MTU mean?

I mostly do the GAP Contour which is like a Light Remington Varmint 5.5, no need to go heavy for the most part. I'm not stacking 22 rounds in 20 minutes.

Accuracy International has always provided their 308s with a lighter contour, I think it too is a light / medium palma weight. (
 

wnroscoe

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Re: What does AMU/MTU mean?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lowlight</div><div class="ubbcode-body">I mostly do the GAP Contour which is like a Light Remington Varmint 5.5</div></div>

Roughly .835" ish at the muzzle at 26", maybe .850" at 20"/22"
 

sinister

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Re: What does AMU/MTU mean?

Most of the Old School 50s and 60s Marines who formed up our Vietnam capabilities knew snipers are hunters who range far afield.

They've been replaced by those who would have a 2-Meter long (with suppressor) Camp Perry-capable weapon you can't carry.

The Remington 5.5 Varmint (as on the original M40 and the current 700V) is a great compromise (especially with a brake).
 

Bangnclang

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Re: What does AMU/MTU mean?

Except for Rock Creek barrels, they show their Sendero slightly heavier, .850 at 26" vs .830 for their Rem Varmint contour.

BnC
 

Patrick Morris

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Re: What does AMU/MTU mean?

I wouldn't say the MTU/AMU is too heavy for a match or carry rifle. I have seen a ton of rifles with these contours win their fair share of matches. If you don't want to use a brake(I hate em), adding more weight is the option for controling recoil. I weigh 130 lbs, when my hair is wet. I need all the help I can get.
 

jbell

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Re: What does AMU/MTU mean?

I dont think the MTU/AMU is too heavy to carry as a comp gun, but in the same sence there is no need for it as stated. I think the med palma or a Tubb is the way to go. I have seen no accuracy loss to the palma style from the heavier barrels.
 
G

Guest

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Re: What does AMU/MTU mean?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Morris#3</div><div class="ubbcode-body">I wouldn't say the MTU/AMU is too heavy for a match or carry rifle.</div></div>


If you ride everywhere a heavy rifle is the ticket. However once you hump shit for more than an afternoon or weekend, you will find perception, is a lying bitch.
The old adage, light is right, applies 110% when your only mode of transportation is your own two feet. I prefer more bang, H20, and a extra battery or two, than barrel steel or filler, myself. Then again it's all based on perception, but after the first tasking, perception will not enter the equation.
 
G

Guest

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Re: What does AMU/MTU mean?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: procovert45</div><div class="ubbcode-body">Mtu barrel. Massive Torture Uphill </div></div>
Winner, Winner.