ARP 134 - The 450 Bushmaster


Welcome to Episode #134 of the AR15 Podcast. One thing that makes the AR-15 such a great platform is the wide variety of caliber choices you can make when putting one together. One of those is the Thumper, the .450 Bushmaster. We want to let you know about a new source of cool products!  Go to to pre-order the Huckleberry patch and buy FRN stickers.

Also, the Firearms Radio Network will be at the 2015 BullPup Shoot in Mount Carroll, IL on September 19th. Go to for more info.

PSA about PSA

Main Topic - The .450 Bushmaster

Invention of the Caliber

Rifle Parts Compatibility

Big punch, shorter range ballistics

Good groups at 100

Same mag, different follower (single stack, 4 or 9 rounds)

Uses .451” bullets, like 45ACP, 45Colt, 460S&W (230gr, 2500fps, 3100ftlb+)

Whereas 458SOCOM uses .458” like 45-70 and 450Marlin (405gr, $$, looks like a jumbo 300blackout)

Straight-wall case, not necessarily crimped - careful of re-chambering like when you’re hunting

Otis Technology:

July 12: Jesse Losey

July 19: Luis Chavez

July 26: Doug Weddle

August 2: Joel Frederick

The fine folks at Otis Technology have sent over a mountain of rifle maintenance tools and cleaning kits for the AR-15 and AR-10.  We’ve been tasked with giving them away.  Watch for the special posts on Facebook and Instagram to get a chance to win some of the awesome products made by Otis Technology.  We’ll give away a complete MSR Cleaning kit in either 5.56 or 7.62 in the middle of each month up until Christmas, when we’ll give away a complete Otis Technology Elite Cleaning System to one lucky listener.  During the alternating weeks, we’ll be giving away a host of Otis tools and cleaning supplies.


James M: Hey guys, love the show. I listen when I have time in the car. Lots of great information to keep me backed up with lots of project ideas. My question is two fold, I clicked on your Amazon link to give you credit for me using Amazon, but is there a marker or url difference so I can know you got credit. Also as frequent shopper on Amazon is there a way for me to make sure my browser always gives you credit. Of course please answer this same question with regards to your more important sponsor... Brownells, as I sure want them to know your listeners are using them. Keep up the good work.

Robert:  Hi Guys!  I love the show, I've been listening to and reading everything I can get my hands on since I got the black rifle bug at the end of 2012.

I recently found your show and downloaded all the podcasts that were available on iTunes (back to episode 103), which is about 30 episodes.  I noticed that the Peter Schiff show has podcasts about 90 episodes available, but they are shorter in length (20-30 minutes) compared to your show (which is about 1:20:00).  Also, the reloading podcast allowed me to download about 40 episodes averaging an hour each.  So it looks like iTunes only allows about 40 hours of any podcast?

So, how difficult would it be to make them available in an mp3 format?  I only have time to listen to them when I'm in the car or going for a walk, and I live in an area where cell reception is rather dreadful, so I can't play them directly from your website, or while sitting at a desk.

Eager for more

Joel Frederick:  Great interview, thanks... I've been a Vortex fan for a while...  Have a couple of their scopes and a pair of their binoculars…

Austin Ledbetter: Which trigger do you prefer for AR15 and which for an Ar10/LR308?  I am a Geissele man myself but hear good thing about Timney and some others, except on reliability with primers. Geissele is the only one I have yet to hear about having a light primer strike or not being able to set off all mil-spec primers with consistency.  Love the show and thanks for the help

Mark M: Hey guys, I was listening to episode 130, and Reed mentioned he has a safe with no carpeting in it.  My safe is just a security cabinet from Stack-On, and it had no carpeting either.  I found a YouTube video of a guy who carpeted his security cabinet himself, and so I decided to give it a try.  All you need is some indoor/outdoor carpet from Home Depot and Loctite spray adhesive.  I applied the carpet to the walls, floor, shelf and inside of the door, and it turned out great.  See the link below to the video I followed.  Jake could even carpet his with lime green shag carpet if he wanted.