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The M110 is a bull barrel, I think it's 4lbs at 20" length, with a .875 gas block. I would say a 20" .750 gas block mid weight is the most popular for said caliber.
20" is the sweet spot for the majority of applications utilizing 168gr-178gr anything longer will give you diminishing returns and anything less and you will be loosing velocity.
Also depending on your perception of precision will change things. What ranges are you looking to shoot at? What kind of accuracy are you looking for at what ranges? What weapons platform? AR-10? If you are planning on stretching out to the limit of the 308 round I'd really go with a 20" bull barrel. If you are looking into a light barrel hunting rifle shooting out to max of around 600m I see nothing wrong with a 18" light barrel. Note- a light barrel will heat up ALOT quicker than a bull barrel will, negatively effecting the accuracy of the weapon. Just things to think about...there is always a trade off.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Wyfox</div><div class="ubbcode-body">The M110 is a bull barrel, I think it's 4lbs at 20" length, with a .875 gas block. I would say a 20" .750 gas block mid weight is the most popular for said caliber.
I know what Krieger is producing for the AMU and the legal service rifle for use in HP but I don't think that is exactly what Knight is producing. I've been producing custom barrels for about 15 years. I think a 18" like the SPR weight would be stiff enough to give decent accuracy out 600-800 yards or further than most shoot but there is that crowd that wants it exactly like what the mil uses and since I already make 11 twist 5R barrels making them 20" similar to the M110 would probably be my best bet for sales. The complaint I hear most about AR10s is the weight so that makes me want to stay to the lighter side of things.
I prefer 16 inch, because the more compact I can have a rifle the better. But I wouldn't go less then 16 because I rather not have a loud and huge fire ball appear when the gun is fired.
when i had my savage 16" 308 i could hit a 4" swinger at 750 at will, very cool little gun, only reason i got rid of it is cuz i got my AW. the short barrel 308's do well
What do I think is the most popular, or what do I personally like?
20 is going to be the most popular of the listed lengths, simply because there are a number of factory rifles in that length....but 16 or 18 would be my preference.
popular or what makes the most sense for a precision rifle? 20" in my opinion because you already lose velocity with a semi-auto, not to mention if you don't handload.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: vkc</div><div class="ubbcode-body">popular or what makes the most sense for a precision rifle? 20" in my opinion because you already lose velocity with a semi-auto, not to mention if you don't handload.</div></div>
I've heard a lot of talk about 18s lately but it looks like most here still favor a 20" and if it's in the same config as the m110 that will probable help sales too so it looks like 20.
I remember reading something along the lines of why KAC created their sr-25 carbines to be 16" was because it has considerable better maneuverability compared to their 20" systems while you only lose around 100fps in velocity, which is still enough to get easily get out to 800yrds.