Agree,

With a silencer they get absolutely grimy even worse. I couldn’t believe how dirty it got after just a few shots. It’s nice to send all that down range.

On that, I don't know why my BO runs so clean. Maybe it's because I'm shooting an 18" barrel? Is it the Barns ammo burns clean? I dunno. I'm using an Omega can. I don't know how many hundreds of rounds have been fired through it, but I've still never cleaned it and it's never failed/never jammed. Very little blow back at all. Chamber & mags barely dirty at all. I only own one suppressed AR so am no expert here. I've seen buddie's rifles and shot some that had a noticable amount of blowback after some range time. I know suppressed AR's overall get dirty, wonder why mine doesn't?

Keep that gun forever.

I'm going to. I'm gonna get it Cera coated next year, never getting rid of it. Accurate rifle with zero recoil. Wilson Combat SS barrel, Geissele trigger, sweet shooting rig. Only thing else I'll do to it is put a Pulsar Thermal on it, gotta buy an offshore fishing boat first. Priorities.

I need to finish my 6.5 Grendel Pistol build, almost done (my "bug out" rifle). I'm planning on suppressing it. I'm willing to bet that short barreled Grendel suppressed is gonna have sheet loads of blow back.

"Because I wanted one" as a response does zero to help anyone understand the answers to the OP's question. Looks like a solid 1/3 of the posts' authors didn't even read the OP's post.

I am curious about this too so I do appreciate the answers that make sense. It seems some of the cartridges mentioned were only invented in the first place as a way to get a certain ballistics, functionality, or "lawfulness" from an AR, so it follows to want to know why someone would want the same in a bolt gun ... logic being that without the AR caveat, there are likely better cartridges to use in a bolt gun.

I love my 6.8 AR. But a 20” mini-action bolt gun in 6.5 G, turned up and with a can, would be a really, really fun shooter and deer rifle.

350 Legend in a bolt didn’t seem like a bad idea to this 14 year old.

https://www.outdoorlife.com/hunting/texas-youth-record-buck/

I think it’s a great idea for a gun enthusiast who has many options. Now if you only have a couple of guns it’s a much harder sell.

Why build ARs around cartridges designed for bolt actions? I confess I love my Ruger American Predator in 6.5 Grendel, while I also have a Ruger Hawkeye LRTR in 6.5 Creedmoor in the safe. The American is much lighter, extremely pleasant to shoot, and extremely accurate.
One of the most accurate rifles I ever owned as an old Savage 12 BVSS target rifle in .223 -- again, so very pleasant to load for and shoot. But then the .223 pretty much replaced the .222, designed for bench rest bolt gun accuracy.
ARs have their place -- a Bushmaster or Socom is a heck of a quick-firing slapper -- but they often run dirty, are obnoxiously "sproingy" although that can be fixed, and will always come up short in the beauty department. I consider them the Sawzall of the rifle world. Useful, but that's about it. I know many will disagree.

For sure. I have been enjoying shooting from under the lean to on my shop. Lay a board on the ground and the ejected brass hits the wall falls to the floor and rolls to the board. Shots fired in the field I just consider lost.

I have 223, 300BO, 7mm08, 6.5CM, and 308 in both bolt action and AR flavors.

Well your wallet might hate you after this, but you can get this barreled action for like $400 with code WLS10. https://www.brownells.com/gun-parts...eavy-barreled-mini-action/?sku=100026421

accuracy?

Because I have my Dad's 50's Remington 722 re-chambered in .223 Wylde in the mid-late 60's after .223/5.56 ammo became plentiful....well before the AR platform got popular.
That being said, when I hunt varmints or whitetails, I carry an ARPerformance barreled AR that is almost as accurate as the bolt gun and capable of shooting something bigger than 60gr due to twist and it doesn't bother me if it gets wet.
69gr OTMBTs pushed with Varget thru the AR is deadly on whitetails if you do your part.

Still doesn't explain why to use a niche AR cartridge in a bolt gun ... which was the question. There's a better cartridge for a bolt gun than something designed to get by deficiencies of an AR.

[quote=unclebubba]The 300 Ham'r vs 350 legend thread got me thinking, and I didn't want to hijack the thread. Why would someone want to build a bolt action rifle around a round that was designed for the AR? Why a 300hamr or 300blk bolt rifle when you can have a 308? Why a 6.5 grendel when you can have a 6.5 Creedmoor? I could see why someone would want a 350 legend bolt IF they were hunting in one of the states that limit you to straight walled cartridges, but other than that, I don't get it.[/quot

My original cartridge that became the legend was first chambered in a bolt rifle and that is what the load testing was done with . I got the idea and made the reamer . Got a barrel blank and went and bought a new Savage bolt rifle to complete the project . I did the AR's later . So the 350 was not designed for an AR .

I've been wanting a 223 bolt gun just to play with, but the wife just lost her side gig. Hard to justify (for me) that unnecessary expense right now.

So do you know why .355 bullets instead of .357?

I look at the legend pretty much a rimless 357 Max with a smaller bullet but does get a little more room in the case with it being .1 inch longer

They make a great youth hunting rifle, or a rifle for us old busted up guys.

.300 BLK bolt action will be my next rifle purchase.

I bought a 5.56 bolt rifle because the ammo is cheap, kills just about anything that lives around here and it will also use .223 ammo. Hell, it will even accept a AR magazine if I really want to waste ammo. I will say, that I prefer my 5.56 bolt rifle over my AR 5.56. I really want to like an AR, but meh.

My favorite bolt guns are in 5.56 and .308. Those two are Ruger GSR in laminate stocks; and are more accurate than the gas guns I have in those cartridges. I like light, handy rifles in the field. I don't need standard capacity magazines or rapid follow-up shots in the field. I prefer short actions over long actions. I don't prefer hunting scopes on ARs and I don't prefer target or tactical shooting with a hunting scope. I like a Rhodesian sling on my hunting rifles and VTAC slings on tactical guns. I don't like to keep a lot of different cartridges and loads. My hand guns are .380 (wife) 9mm and .357 Mag; Rifles are in .357 Mag, 5.56, 6.5G, 6.5CM and .308. Round that out with 22LR and 12GA, and I'm good. I probably wouldn't want a bolt gun in 6.5G and I wouldn't want a gasser in 6.5CM. I am a sample size of one, but my setup just works for me.

I used .223 cases for mine as they are free , they are everywhere . Win made their base about .006 larger so you had to buy their brass . I used .357 pistol bullets as they are cheap and work well , with my .355 barrel . .355 bullets means new and more expensive bullets . Mt best bullet was the 180 xtp . Yes a better hog [ what I made it for ] and deer round for kids / women as it hits harder with less muzzle blast .

Makes sense they would spec it so they can sell more bullets instead of the plethora of existing bullets in .357,

I do have one rifle that I shoot oversized jacketed bullets in a 38-55 that intentionally had a .375 barrel put on it when built. it does resize the bullets to the smaller bore and raises the pressures some in doing it. The man that designed that rifle and action said it is setup the same as his Daughter's and it is fine to shoot the 38-55 in as it is marked but expect an increase in velocity. Or just do like his Daughter does shoot 375 Winchester from it.

On the blk out, going to a bolt gun, you gain about 100-150 fps over an AR with the same 16" barrel. I can run 110 V-max and 125 grain bullets 100-150 fps faster in a 16" bolt gun than you can in an AR platform. I call it the gas gun tax. You typically lose about 75-100 fps in most rounds going to an AR.

You compare the 300 HAMR and 300 Black out to a 308, but it's a totally different case and size. Same as Grendel going to 6.5 CM.

I also shoot a 224 Valkrie in a Mossberg MVP bolt gun. I love it! I'll be shooting it this season some for hunting. I have a 224 Valkrie AR, but I like the bolt gun better.

I prefer bolt guns over AR's in general for hunting. But I like to shoot both. I find the bolt guns more accurate, easier to dial in, and much quieter when shooting suppressed. My 224 Valkrie bolt gun is VERY quiet when shooting suppressed.

Most .357 mag barrels are about .356 in real life . Squeezing down a soft pistol bullet an extra .001 or so will not make much difference .