BenchMark built custom 450 Ultra Magnum.

[Biggerhammer]

 BenchMark built Rem700 450 Ultra Magnum( .375 Ultra necked up to .458), I had Dave Kiff at Pacific Tool And Gauge build my reamer. I went with a stainless fluted Lilja, 14 twist 26" inch  #7 barrel with a Harrell's muzzle brake. I also had them do a thread protector so I can shoot it without a brake along with a Sako extractor. RCBS did the custom dies and CEB (Cutting Edge Bullets) was kind enough to make the 370gr BBW#13 Non Conventional Hollow Points W/ballistic tip inserts. Load development, case forming and chronograph work will begin this weekend.I need to have it worked out before my Observatory bull permit starts.








EDITED 11/3 , Pictures added.

I posted some pics and story under the " Elk Hunting " forum but thought I would follow up in this post. It was nice to see the project through from start to finish. Have it go from just a idea on the range to a built custom rifle. Load development and bullet selection for the area I was going to be hunting and the distances I would be shooting. Then to take a branched alter bull with the setup was amazing to say the least. In the end it was well worth it.








The shot was at 300 yards and bellow is a picture of the recovered bullet found just under the hide on the off side. 350gr Speer HotCore just shy of 2800 fps, the recovered bullet weighed 248.4 grains.

[Woodchuck]

Bull what? Cape Buffalo? Very nice rig for sure.

[JimmyHoffa]

Really nice looking build.  I like the cartridge set up, looking forward to seeing your ballistics.  Should be a sweet elk gun.

[high country]

If you ever want me to test drive that reamer.....I could see me building one of those.

[whacker1]

how much does it weigh?  Very cool looking set up.

[Biggerhammer]

If you ever want me to test drive that reamer.....I could see me building one of those.

Anytime High Country...

[Biggerhammer]

how much does it weigh?  Very cool looking set up.

9 lbs before the optics were mounted, haven't weighed it dressed up and loaded yet.

[couesbitten]

   Beautiful rifle, looks like a Vortex scope, what rings and bases?

[high country]

How bad do bullets hit the wallet?

[Biggerhammer]

How bad do bullets hit the wallet?

Just under $3.00 a piece with the polymer insert tip.

[high country]

I am anxiously awaiting chrono results.......

[Biggerhammer]

  Beautiful rifle, looks like a Vortex scope, what rings and bases?

I set this rifle up with what I had on hand at the time. It's a 6.5-20 Vortex Viper with a 20 MOA Weaver base and 6 screw Weaver rings. The rifle alone set me back enough, the optics and mounts will be upgraded in time or I will park glass off of one of my other rifles on it.

[huntandjeep]

Nice rifle

[deerslyr]

That looks like it will do some serious damage on an elk!

[GoldTip]

Holy crow, thats a helluva gun.  When did they start giving out bull elephant permits for the Observatory unit? Or is it a bull hippo permit you drew?