The Ruger in .450 Bushmaster can also be easily suppressed via its 11/16-24 threaded muzzle. Well seems the AR's started in the 1:24 twist rate, but more options are becoming available. I see the bolt guns running 1:16 twist. It will be a great experience. The twist rate is measured by how many inches of bullet travel down the barrel it takes the rifling to twist the bullet one full turn. Barrel Twist How many "inches per turn" is your rate of rifling twist. While most of these are chambered in 5.56 NATO, Ruger also made a model in .450 Bushmaster. Last November, I bought 2 Ruger 450's . Check out the Ruger American .450 Bushmaster Deer Rifle. (For a more comprehensive list, see the expanded "Rifle Barrel Twist List" on the Tables, Charts and Lists page. ).17 HMR = 1 in 9".22 Long Rifle = 1 in 16".222 Remington = 1 in 14".223 Remington = 1 in 12" (varmint rifle) Is a great straight wall cartridge deer rifle. I've worked with the same thing in a 44 caliber wildcat, you can throw a 460gr cast bullet stabilized in a 1:16t. Re: twist rate for a 450 bushmaster 450 bushmaster is not a pistol caliber as I understand it. Ruger American is 1:16 with 16" brl, Bushmaster is 1:24 with 20" brl and new Savage 110 is 1:24 with 18" brl. I am looking at the Savage as a possible addition. Typical value for this input is between 1:7" and 1:13". This number is used along with other inputs to determine the stability and related trajectory metrics. Here is a formula for calculating twist rate: Here are the usual twist rates for most of the popular rifle calibers. This measurement is called the “rate of twist” and is expressed as a ratio, such as 1:7, which means the … I know Ruger uses a 1/16 but the reason may have to do more with cost of making vs accuracy. Ruger was late to the show, but finally entered the market in 2009 with a high-end model called the SR-556. If you have not already go to Randy's Outdoors, Bad Axe MI . I like the Precision Armament Hypertap because it effectively mitigates the powerful blast generated by .450 BM. If you don’t already own an AR and still want to get in the .450 game, I highly recommend the Ruger American Rifle Ranch that is already set up and ready to go for .450 Bushmaster cartridges.. Any standard AR-15 can be converted to fire the .450 Bushmaster… Curious why they are not more similar. However, in 2014 it released a low-priced, made-in-America line of ARs called the AR-556 and soon afterward the AR-556 MPR. Twist rate. From a different forum ===== Yes there are various grove diameters for pistol blanks but my point was, are many of the 450 Bushmaster barrel makers using 1: 16 twist not because they have done research to prove it works better but simply because 45 Caliber pistol blanks … 450 bushmaster gun #6966029 08/16/20 06:44 PM 08/16/20 06:44 PM: Joined ... On those weight bullets you want to shoot it makes not never minds what twist rate you have. Figured Id start a thread with what Im finding is available, so others joining the game will have some options. 2.