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  #1  
Old 08-07-2018, 05:41 PM
nf1e nf1e is online now
 
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Default Bula Defense Systems .450 bushmaster XM21

First XM21 out in .450 bushmaster followed me home from Camp Perry this year. Looking forward to putting some " big lead" down range.
There is a spare VXR-Patrol in 1.25 - 4 that is just itching to top of this big girl.
This rifle was build by a member of this forum. Thanks Josh.



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  #2  
Old 08-07-2018, 06:00 PM
Deuceguy Deuceguy is offline
 
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My pleasure Art!
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  #3  
Old 08-15-2018, 04:58 PM
nf1e nf1e is online now
 
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Got my first case of Hornady ammo for Miss Thumper today.
Hopefully, in the next few day she will visit the range and have a little fun.
While I am at it there's a bunch of prepped Starlite brass in the dryer in the shop. Got the powder, bullets and primers ready to whip up a batch tomorrow afternoon.

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Old 08-16-2018, 11:13 AM
nf1e nf1e is online now
 
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Trust but verity kit arrived from Pacific Too & Guage today.

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Old 08-16-2018, 11:44 AM
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Rifle is all set with scope mounted.

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Old 08-16-2018, 12:24 PM
nf1e nf1e is online now
 
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Ammo and bullet comparison side by side.

Mouse gun on left, next .450 then 6.5 then .308.
ARs are available with uppers for .450 While M14s are good to go with .450, 6.5 and .308.
Other calibers are available , but these are mine and I am sticking to it.

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Last edited by nf1e; 08-16-2018 at 12:29 PM.
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Old 08-17-2018, 04:39 PM
nf1e nf1e is online now
 
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A bit of time availed itself this afternoon so I had an opportunity to get to know the thumper just a little. I would like to compliment Josh at Bula Defense for a super job of building this fine rifle for me.
Also I would like to thank Wayne the owner of Bula Forge for assisting Josh in fitting the handguard over this monster barrel. Well done guys, the teamwork was enjoyable to watch.

This photo show the .450 bushmaster barrel next to a USGI H&R. I think the bushmaster is more of a lolly collum than any barrel I have been used to.

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Old 08-17-2018, 04:43 PM
nf1e nf1e is online now
 
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Checked headspace with brandy new Pacific Tool and Guage gear.
First photo if field guage.



No/Go



Then the one we look for, the "Go" guage. Bout time huh?

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  #9  
Old 08-17-2018, 04:46 PM
nf1e nf1e is online now
 
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This was the fun part and a learning experience to boot.
Used 20 rnds of Hornady 450 Bushmaster 250 gr FTX for my first date with thumper. Not disappointed , but a little surprised that the recoil was not as significant as expected. That's a good thing.
As with every XM21 I have put together , the scope I moved to this new rifle was dead on for windage but about 8" low at a hundred after firing M118 in the last rifle it was mounted on.
4 shots got me up into the 4" siting box without a problem where it did a reasonable 2" group.
Target photo is of the second target. Hits started at the top and walked down 5" as the barrel carboned up and the lead slowed down. The shot 1.5" to the right was on the 7th shot and called. So it appears that the bushmaster likes a clean barrel, as least to start with. We will see how it works after breakin.
So, a 5" drop in elevation after 20 rnds rapid fire ain't that bad for a supposed hunting rifle.

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Old 09-01-2018, 02:43 PM
nf1e nf1e is online now
 
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Well, it took a little time to get back to the Bushmaster but managed to get out and shoot some this afternoon.
Shot 2 Dirty bird 10 rnd targets at 100 yds. 1 target 97-3x the other 97-5x.
All I need to do now is figure out why the first shot out of every mag is at 8 oclock in the 8 ring. Almost identical shot placement for the first rnd out of every mag. Other than that and watching out for the scope during recoil, this animal is a blast.
Using Hornady 250 gr FTX moving at 2200 fps, this critter lets you know when you pull the trigger. Sure wouldn't want to be on the receiving end of this Thumper.



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