Cutting down barrel browning abolt questions

[JML90_MN]

Anyone have their browning abolt barrels cut for suppressor? Browning stainless steel abolt in 270 WSM, 23" barrel

I know there are a few threads discussing this already with some other models but I am looking at having a local gunsmith thread my browning abolt for a suppressor and I have a feeling I will need to cut down the barrel to get enough diameter for the threads for this to work. My main concern is impacts to velocity, performance down range, accuracy, etc.. I understand shorter barrel = less velocity, but how much?

 

[35WhelenAI]

Velocity loss per inch of barrel length is a fairly known thing. Take a look on the internet and average some numbers.

 

[sdupontjr]

If you hand load, you might not see much of a difference. I kept my Abolt II in stock form. However I do have 2 tikka 308's. One is a T3 lite with stock barrel and the other is a CTR with 20". I developed a load for my CTR that shoots a slighter better velocity than my T3 lite with a shorter barrel. So as far as Velo is concerned, there is basically no difference. Now shooting factory ammo may show some change, But I don't shoot factory ammo. Depending on how much you cut, if you cut to 20, you may loose 150-200 fps with factory ammo.

 

[jkoehle1]

15-40 fps is typical from what i have gathered, depending on barrel length and cartridge.

 

[Scottf270]

An opinion only. If this is a rifle you really don't shoot that often and just hunt with, I don't think the effort is worth it. I don't have a suppressor at all and don't think I will get one.

My hunting rifles are not shot all that often and my most used rifles are small calibers anyway. It's your choice ultimately, do what makes you happy.

 

[JML90_MN]

Thanks for the responses. I started with an internet search, even found someone with data for a 300wsm in 16vs24" barrel that saw 16-20 fps drop/ inch. But nothing beats someone else already doing exactly this and sharing their experiences.

I will be handloading both 270wsm and 300wsm, so I'll get better velocities than factory. I picked up this 270wsm and a 300wsm from an old family friend, at a price I couldn't pass up, otherwise I would just buy a new gun already threaded. So now I am suppressing my hunting rifles to shoot more at the range and try to minimize my tinnitus .

 

[juju]

I had one threaded. I did it as 1/2 instead of 5/8, because the OD of the barrel wasn't enough for 5/8. No problem. They suggested another diameter, but my suppressor came with 1/2 and 5/8. There are options to avoid cutting a barrel. If you look around you may find a suppressor maker not far from you who does barrel threading also. There are lots of smaller operations that don't show up on the major retail sites.

270 WSM is great, but it's getting to be a handloading proposition.

 

[JML90_MN]

15-40 fps is typical from what i have gathered, depending on barrel length and cartridge.

Any change in accuracy from your experience?

I had one threaded. I did it as 1/2 instead of 5/8, because the OD of the barrel wasn't enough for 5/8. No problem. They suggested another diameter, but my suppressor came with 1/2 and 5/8. There are options to avoid cutting a barrel. If you look around you may find a suppressor maker not far from you who does barrel threading also. There are lots of smaller operations that don't show up on the major retail sites.

270 WSM is great, but it's getting to be a handloading proposition.

Ya I wouldn't have bought it had it not been the right price. And the guy was already handloading for it so I got all of his supplies. Was yours also a browning abolt?

I can do 1/2 threads with the can but anticipating needing to still cut down based on the outer diameter. Its at the gunsmith right now to be looked at.

 

[35WhelenAI]

I like your plan, good research and checking things out. Hand loading you may get a few more feet per second but I wouldn't go chasing a velocity number if it gets above publish data. 270 WSM is already loaded pretty good from the factory because it's a modern cartridge and only modern rifles are chambered for it. Not a lot of extra pressure you can push without going over specs.

 

[Caseknife]

Pretty much the minimum diameter for 1/2x28 is .6-610"

 

[juju]

Any change in accuracy from your experience?



Ya I wouldn't have bought it had it not been the right price. And the guy was already handloading for it so I got all of his supplies. Was yours also a browning abolt?

I can do 1/2 threads with the can but anticipating needing to still cut down based on the outer diameter. Its at the gunsmith right now to be looked at.

Yes. I've always had good luck with used A-Bolts. I have one in 270 WSM that may get threaded, but 23" + suppressor is a lot. And I take very few shots with it that I can't have Bluetooth ear muffs on.

There's more than one way to get a barrel ready to thread a suppressor on. You can get what you want either way; just may need to find the right gunsmith.

 

[jkoehle1]

Any change in accuracy from your experience?



Ya I wouldn't have bought it had it not been the right price. And the guy was already handloading for it so I got all of his supplies. Was yours also a browning abolt?

I can do 1/2 threads with the can but anticipating needing to still cut down based on the outer diameter. Its at the gunsmith right now to be looked at.

300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16″ 300 Win Mag?

Introduced by the Winchester Repeating Arms Company in 1963, the 300 Winchester Magnum (300 Win Mag) is based on the 375 H&H case shortened to fit a standard length action and necked down to 30…

rifleshooter.com

Heres what id guess youre looking at.... for velocity loss 300 wm should be comparable.

There wont be an accuracy loss theoretically - i could see different ammo having different es/sd depending on barrel length (in the same barrel) but im not sure how youd ever really be able to prove one way or the other.