Barrel length with suppressor?

[BLACKFINTURKEY]

Shorter the better! I’m thinking about a 13-14” 308 with a pinned brake to make it 16” so I don’t have to stamp it.

[Closetohome]

ive been trying to research similar for the same can. I love my 25-06 and dont want to change guns. Its 22. Im def going to have it cut to 20 when i have it threaded. I think between the can and cut, i wont change much velocity. However, i am thinking of cutting to maybe 18.5 for maneuverability but have read that with the 25 its a big hit going under 20", but cant find where anyone has actually posted speeds. Ill probably never shoot over 200, so will lose some of the 2506 performance, but still plenty to take a deer id think. I do handload, so i can play with powders for speed. I just dont want to be sending a bunch of hot unburnt powder into the can

20" would be a good compromise but 22" isnt horrible.

A good test is to pull up load data online for similar bullet weight and look at a powder burn rate chart...if asking for anything slower than H4350/H4831 I would have a hard time dropping below 22" as you lose more fps per inch. Overbore cartridges like a 25-06 and magnums use slower powders that need barrel length to get full burn. I plugged a 25-06 with 115 Berger into Quickload and from 26" to 20" barrel it lost 250-280 fps depending on powder. A 25 Creedmoor for comparison only dropped about 180-200 fps from 26" to 20" and was almost equal to the 25-06 at 20" with the same bullet.

As a handloader, I tend to slide up the powder burn rate chart a bit with shorter barrels as the slow stuff just spits more unburned powder into the can. I also look for higher BC bullets so that even with lower velocity they tend to retain it further down range. I built my son an 18" 6.5 Grendel for his first rifle because it has almost no recoil suppressed...I loaded up 127gr LRX's at 2405fps which doesnt sound like much but with 0.468 BC they keep it over 1k pounds of energy to 300yds which is more than he will shoot at 8yrs old, and they hammer.

[Tejas Wildlife]

20" would be a good compromise but 22" isnt horrible.

A good test is to pull up load data online for similar bullet weight and look at a powder burn rate chart...if asking for anything slower than H4350/H4831 I would have a hard time dropping below 22" as you lose more fps per inch. Overbore cartridges like a 25-06 and magnums use slower powders that need barrel length to get full burn. I plugged a 25-06 with 115 Berger into Quickload and from 26" to 20" barrel it lost 250-280 fps depending on powder. A 25 Creedmoor for comparison only dropped about 180-200 fps from 26" to 20" and was almost equal to the 25-06 at 20" with the same bullet.

As a handloader, I tend to slide up the powder burn rate chart a bit with shorter barrels as the slow stuff just spits more unburned powder into the can. I also look for higher BC bullets so that even with lower velocity they tend to retain it further down range. I built my son an 18" 6.5 Grendel for his first rifle because it has almost no recoil suppressed...I loaded up 127gr LRX's at 2405fps which doesnt sound like much but with 0.468 BC they keep it over 1k pounds of energy to 300yds which is more than he will shoot at 8yrs old, and they hammer.

Are you thinking about adopting any more kids? I am available if you continue building custom rifles like this!! Great info too by the way.

[Closetohome]

Are you thinking about adopting any more kids? I am available if you continue building custom rifles like this!! Great info too by the way.

In reality dad really wanted a bolt action Grendel that happened to double as the perfect caliber for his son

[Etxbuckman]

20" would be a good compromise but 22" isnt horrible.

A good test is to pull up load data online for similar bullet weight and look at a powder burn rate chart...if asking for anything slower than H4350/H4831 I would have a hard time dropping below 22" as you lose more fps per inch. Overbore cartridges like a 25-06 and magnums use slower powders that need barrel length to get full burn. I plugged a 25-06 with 115 Berger into Quickload and from 26" to 20" barrel it lost 250-280 fps depending on powder. A 25 Creedmoor for comparison only dropped about 180-200 fps from 26" to 20" and was almost equal to the 25-06 at 20" with the same bullet.

As a handloader, I tend to slide up the powder burn rate chart a bit with shorter barrels as the slow stuff just spits more unburned powder into the can. I also look for higher BC bullets so that even with lower velocity they tend to retain it further down range. I built my son an 18" 6.5 Grendel for his first rifle because it has almost no recoil suppressed...I loaded up 127gr LRX's at 2405fps which doesnt sound like much but with 0.468 BC they keep it over 1k pounds of energy to 300yds which is more than he will shoot at 8yrs old, and they hammer.

Good Lord that makes my head hurt. LOL I am way too OCD to get that far involved into something like this, and pretty much I refuse to handload.

[Granjeno95]

I run a 20” proof barrel on a 300 WSM with a 9” suppressor. Harvested a cow elk at 330 yds with it. The elk did not notice the 100 fps lost with a shorter barrel.

[HUNTIN HARD]

I have a APR 6.5 PRC with a carbon 24” barrel. I’m wanting to change it out, what would be the shortest I could go 18-20”?

[splitbeam145]

I have a 6mm CM with a 16.5 CF barrel with a Silencerco Harvester that's a hammer on animals and easy to carry and manuever in blinds. Also have a AR 12.5" 6.5 Grendel with Silencerco Omega thats my nighttime rig.

[splitbeam145]

How far are you going to shoot? It’s a major factor in the discussion. A can will add back some of your velocity with a shorter barrel.

I can tell you that a 243 and 7-08 with 16” barrel is great. I’d go 20” on a 7Mag.

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