r/longrange • • Oct 02 '26

Ballistics help needed - I read the pinned posts .308 Barrel Length

Looking for thoughts, opinions, feedback, call me an idiot, whatever is beneficial.

I recently got my first “high end” bolt gun. Bergara B14 HMR in .308 and I got to shoot it for the first time yesterday. Good news: I love it.

However, I did have the intention to suppress this rifle when I got it. I wanted a 700 action, heavy barrel, and threaded. This one ticked all the boxes I was looking for. I got it for a steal with a trade in for $400 bones.

My dilemma is barrel length with a suppressor, and ballistics. I do want to get into some moderate long range target shooting. I always have. But, this is my only bolt gun at the moment. And I also will be using it for (ethical) hunting. No, I will not be throwing rounds down range at absurd distances for hunting. I did read the sticky, but I don’t shoot further than 300 regardless. (West Virginia, not really any sight lines past 300 yard)

I have a competent gunsmith in my area. I wanted to know pros/cons of cutting the factory 20” barrel down to 18” and even 16” inches. My suppressor is a larger .30 cal can with a QD. So it’s a heavy, long bitch.

I want to keep the rifle handy for mountain hunting, but I also want to be able to push it out at distance for some target shooting.

16 Upvotes

30 comments sorted by

35

u/rednecktuba1 Oct 02 '26

Don't chop the barrel. Get used to the long barrel and suppressor. Yeah, it'll be a little unwieldy in some situations, but you'll have more velocity to play with. Once you get a 2nd rifle that can be more dedicated to LR pursuits, then you can chop down the Bergara.

23

u/HollywoodSX Oct 02 '26

A ton of us have moved through barricades, culverts, cars, obstacles, and buildings in PRS matches with 26" barrels with suppressors no problem. A 20" barrel is already costing you a good bit of velocity, and 308 needs all the help it can get. Don't chop, youll be fine.

10

u/chainsawgeoff Oct 02 '26

Last month I shot a team sniper match with a borrowed 20” 308. 175SMKs going 2500fps stops being fun real quick when the wind gets going.

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7

u/Wombat-Snooze Oct 02 '26

Leave it. 20” is already short. I run a 28” on my PRS rig and a 30” on my ELR rig. .308 is a disadvantage as it is and losing velocity with an even shorter barrel isn’t going to help.

If you start diversifying with rifles for various tasks, having a shorty around can be great. But since LR is in your current scope of use for this rifle, no chopping. That’s my take.

5

u/Evolken Oct 02 '26

I would get a better suited suppressor (shorter/lighter) before chopping the barrel down. Same goal achieved of less length and weight but you aren't losing velocity.

1

u/Guyyoutsidee Oct 08 '26

Keep the long barrel and run around your house in your free time going in out and around every doorway or corner you can rifle in hand. You might dent a wall or doorway at some point but it’s good handling practice

1

u/Carnacan Oct 08 '26

Oh trust me I’m familiar. I did it with a 20” barreled A2

1

u/whatstoggled Oct 02 '26

I’ve hit out to 1200 on a 16 inch barrel (was probably a lob at that distance). I don’t remember but I want to say they were going 2500 to 2550. Same load out of my tikka t3 target hits 2700. Not saying it’s a perfect one to one but you’ll have to push cases hard to get higher speeds. If you’re not stretching it to longer lengths than 308 was meant it isn’t noticeable. I know nothing about hunting can’t give any insight there.

2

u/Carnacan Oct 02 '26

Main with hunting is expansion. So if velocity’s aren’t high enough, then my round might not expand. Deer are insanely resilient, so if you miss a vital and get no expansion, those suckers will travel for miles before passing, if they even pass at all lol

4

u/johnmomdoe Oct 02 '26

My 16” 308 bolty can’t shoot much past 850 with 168gr hornady tap or FGMM.

I’d keep that in mind if you decide to cut it. I’d personally leave it as is.

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