Thanks for the video.

 

Encore

Hornady instructions are not good for this die set. Think of the 450 as something similar to a giant 45 acp. The cartridge headspaces on the case mouth.

When using the expander die expand the case very little. The 450 needs a heavy bullet pull. Over expanding will cause loss of neck tension.

The seating die if set to deep will start a roll crimp on the case mouth. Not wanted. I set mine by placing a trimmed to length case in the press. Raise the ram to the top then screw the die down to touch the case then back off a couple of turns and lock it down.

The set includes a taper crimp die. This is the one to use. A proper taper crimp should be (when measured at the case mouth) close to .473-.474.

Lots of info here
http://450bushmaster.net/

 

Encore

Hornady instructions are not good for this die set. Think of the 450 as something similar to a giant 45 acp. The cartridge headspaces on the case mouth.

When using the expander die expand the case very little. The 450 needs a heavy bullet pull. Over expanding will cause loss of neck tension.

The seating die if set to deep will start a roll crimp on the case mouth. Not wanted. I set mine by placing a trimmed to length case in the press. Raise the ram to the top then screw the die down to touch the case then back off a couple of turns and lock it down.

The set includes a taper crimp die. This is the one to use. A proper taper crimp should be (when measured at the case mouth) close to .473-.474.

Lots of info here
http://450bushmaster.net/

Ok, very little expansion, got that part. I take it by backing off the seating die a couple turns, its preventing the roll crimp. I use the bullet seating screw to adjust for OAFL? Then use the taper crimp die instead, to tighten the bullet in the case. It sounds like this may take a little work getting it right. So with an unloaded (no propellant or bullet) case ONLY, you set that die to crimp the case at .473-.474, which should hold the bullet sufficiently?

 

Hey Encore just curious if you think the Barnes 250 tmz would be able to be loaded for the bushmaster?

 

The TMZ is a .451" bullet, where everything ..... I think... loaded for the .450B is a 452" bullet. The bullet length would also be a problem.

 

I have been doing some digging and found this for what its worth.already contacted Barnes and here's what they have to say:

Hello,

Our .451 muzzleloader bullets work great in the 450 Bushmaster. We have had customers experiment with great results. The only bad thing is that we don’t yet have any load data. We are planning on shooting some, but it could be 6 months or more before we can squeeze it in. We will get it done as soon as we can. Thank you for your patronage.

 

After reading this, I did a little checking on:

http://450bushmaster.net/search.php?st=0&sk=t&sd=d&sr=posts&keywords=Barnes

It appears the Barnes bullets the guys are loading are:

 

Glad more offerings are coming available. I love all of the Barnes bullets in my 450. They are pricey but the are accurate and expand beautifully.

 

I'll be trying a few of these.

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I seen a guy test the .450 Bushmaster bullet with a muzzleloader at 2,000fps. It was shot through a piece of carpet glued to a piece of thin plywood, then into water jugs. You could put the bullet right back in the rifle and shoot it again. Zero expansion at 2,000fps ?

 

The tip probably plugged up. That would cause it to act like a FMJ and not expand. I've had it happen with a 44 mag shooting through plywood and into sand. Have a pic of 2 identical projectiles (somewhere), one expanded beautifully, the other not at all and has splinters sticking out of the hollow cavity.

It's actually a pretty common problem with HP projectiles. Enough so that Hornady came out with their "Critical Defense" product line.

 

What are the finished OAL of some of the bullets? From the primer face to the tip of the 250gr FTX bullet?

 

I run as listed below. (Note: this is for a AR)
200 barned xpb 2.185
240 xtp mag 2.065
250 FTX 2.225.

 

I shoot the T-EZ 250 flat base. Way under 1" groups, and non-existant fouling. I shoot them at 2350 in a Ruger, but they can be pushed up to 2500 quite easily, according to a test by Gunblast.com.
Performance on deer is excellent. Whole other world than the FTX cup and core.

 

Depending oh how far you seated those bullets it looks like around 45gr of H110 to get 2300+ with that 250gr.

 

I'm guessing Jeff Quinn ran close to 50 grains of H110. On the article it shows the loaded round, so you can approximate OAL. Probably over 2.400".
In my loads with the 250 T-EZ, I use Lil' Gun. I didn't seat mine as long as his, but they do like a bit of a jump for accuracy anyhow.
Zero issues with copper fouling. 2425 FPS as measured by a Chrony out of a 16" Ruger.

 

2.325"
The new TTSX are just slightly longer to keep the mouth of the case out of the groove.
Tried both bullets and there really is no advantage of the new TTSX over the muzzleloader T-EZ or Remington Accutip branded version of the same

 

2.325"
The new TTSX are just slightly longer to keep the mouth of the case out of the groove.
Tried both bullets and there really is no advantage of the new TTSX over the muzzleloader T-EZ or Remington Accutip branded version of the same

Thanks Ken! I put some down range earlier tonight. 2.26 OAL and was getting some good results with 39.5 and 40 grains of lil gun. I’m shooting a Ruger American Ranch with a Hybrid 46 Suppressor. Groups were just under an inch. Like you I didn’t experience any fouling issues.

 

That's the good thing about the 450- generally doesn't take too much work to get good accuracy with most any load/bullet.
350 L is another story.

 

That's the good thing about the 450- generally doesn't take too much work to get good accuracy with most any load/bullet.
350 L is another story.

350 is just as easy if you have years of 357 Maximum experience and kept notes...lol

450 BM has had the boys on 450bushmaster forums do all the development and post it for everyone’s reading...


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