300 Fireball AR15 (Brass forming - post #150)

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Good god! You look exactly like Doc's long lost cousin. You sure you guys aren't related? Must have been weird the first time you two meeting each other. :stirthepot2:
 
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Good god! You look exactly like Doc's long lost cousin. You sure you guys aren't related? Must have been weird the first time you two meeting each other. :stirthepot2:

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AHEM!

There is CLEARLY a difference here. See if you can spot it, and check below for the answer!

.ʇɐɥ ɐ buıɹɐǝʍ ɯ,ı

-M
 
I would say "but the tattoos are different," however my arms are covered by my lumberjack shirt... hmm.

Have I been talking to myself this whole time??? :confused:

If yardie and I are actually the same person, then I have an AWESOME house and a HOT girlfriend... :D

No, wait - my glasses are full-brow Oakley M-Frames from my shotgun days... phew! We're still different.

There's a definite budding 'bromance' though.

-M
 
Good god! You look exactly like Doc's long lost cousin. You sure you guys aren't related? Must have been weird the first time you two meeting each other. :stirthepot2:

You just never know...!!

;)

AHEM!

There is CLEARLY a difference here. See if you can spot it, and check below for the answer!

.ʇɐɥ ɐ buıɹɐǝʍ ɯ,ı

-M

I was going to say definitely not the calloused knuckles from dragging...!


I would say "but the tattoos are different," however my arms are covered by my lumberjack shirt... hmm.

Mine don't wash off...!

Have I been talking to myself this whole time??? :confused:

I do that on a regular basis...:runaway:

If yardie and I are actually the same person, then I have an AWESOME house and a HOT girlfriend... :D

Thanks man!!

There's a definite budding 'bromance' though.
-M

Gah...!! Not in public...!!

:D
 
There's a definite budding 'bromance' though.

I am gonna respectfully look the other way cause I can't stomach a PDA between you two hairy apes. cp:

Hey, just to bring the subject back on topic, what bullets you all been using?

I was measuring and scheming and discovered two unhappy facts:

A. The 200gr cast lead hollow points I have been hoarding for years are just not gonna work in the Whisper. To keep the ogive off the lands the bullet has to be seated about 3/4 the way into the case which will cause all kinds of problems with powder space and feeding. :owned:

B. In order to get the 208gr AMAX to fit into the mag, the bullet ends up about 130 thou off the lands. Not a crisis but makes me wonder how accurate it will be with a jump like that.

On the good news side, the Matrix 200gr bullets I have are nice and stumpy meaning they fit nicely into the mag and can be loaded out to the lands. Don't know how accurate they are but so far they have all loaded and gone BANG. :ar15:

It looks like the Lapua 200gr Subsonic bullet will also fit and function properly based on its shape and length. Haven't shot any of these yet cause they are spendy and I don't want to waste them doing load development.

I have a hundred 110gr supersonics loaded and ready to go. Not sure what I am gonna do with them but they are loaded and ready to go. :ar15:
 
I am gonna respectfully look the other way cause I can't stomach a PDA between you two hairy apes. cp:

Hey, just to bring the subject back on topic, what bullets you all been using?

I was measuring and scheming and discovered two unhappy facts:

A. The 200gr cast lead hollow points I have been hoarding for years are just not gonna work in the Whisper. To keep the ogive off the lands the bullet has to be seated about 3/4 the way into the case which will cause all kinds of problems with powder space and feeding. :owned:

B. In order to get the 208gr AMAX to fit into the mag, the bullet ends up about 130 thou off the lands. Not a crisis but makes me wonder how accurate it will be with a jump like that.

On the good news side, the Matrix 200gr bullets I have are nice and stumpy meaning they fit nicely into the mag and can be loaded out to the lands. Don't know how accurate they are but so far they have all loaded and gone BANG. :ar15:

It looks like the Lapua 200gr Subsonic bullet will also fit and function properly based on its shape and length. Haven't shot any of these yet cause they are spendy and I don't want to waste them doing load development.

I have a hundred 110gr supersonics loaded and ready to go. Not sure what I am gonna do with them but they are loaded and ready to go. :ar15:

Have you tried the Sierra 240 gr MK at all??? I had a 16" Contender barrel back in the day that loved tose things...
 
My best luck so far has come with the Combined Technologies 180gn Ballistic Sivertips (the Winchester-Nosler hybrid). They're pretty spendy at $0.60 or so apiece, but yardie can testify that I have my .300 running like clockwork on those things right now. Loaded about 30 thou shorter than mag length (by eyeball), they work fiiiiiine just fine.

However, they're not exactly a cheap range-plinking bullet... so I'm actually in the process of trying (and failing) to make my own custom cast bullet mould. I've tried cherry cutting a few, but without a double-acting vise it's tough sledding. So, I'm going to try a lathe boring approach, or use an R8 boring head on the mill. Either way, it should take care of the problems I've been having with unsupported side cutting using such a thin profile cutter (cherry) on one half of the mould at a time.

I also plan to run a long, deep but thin, hollowpoint pin through the works - and will let you all know how it turns out.

Thus far though, the 180 Ballistic Silvertips have been my most reliable feeding/cycling subsonic "pill."

This after I also swapped the semi-auto BC from my 5.56 upper, and lightened it on the lathe by machining 10 grams off of the back end. I thought I'd start small (like a haircut - you can always take more OFF...) since the semi BC was jussssssst about perfect... but the 10 grams has actually worked quite well with the 180's. I might knock another 10 or 20 grams off and see if I can get the thing to cycle 100% with the 147-grainers I can get in bulk as milsurp. I'd really prefer to go cast though - nothing is as cheap as cast...

-M
 
My best luck so far has come with the Combined Technologies 180gn Ballistic Sivertips (the Winchester-Nosler hybrid). They're pretty spendy at $0.60 or so apiece, but yardie can testify that I have my .300 running like clockwork on those things right now. -M

Amen!!!!

Testify...!!
 
Hum.... now I know what to do with that .308 barrel I just removed from my m700..

anyone has a chamber rimmer I could rent, borrow or buy?

Good call!

Down the road, I'm going to be ALLLL over a .300 Fireball/Whisper build on a cheap .223 action that I'll rebarrel.

If you're serious about the reamer, call Pacific Tool and Gauge. Or just wait a tick and I'm sure ATRS/Suputin will be able to tell you where they got theirs...

-M
 
I'd really prefer to go cast though - nothing is as cheap as cast...

Not a good idea in a gas gun. Too much lead and you will end up plugging the gas tube.

Or just wait a tick and I'm sure ATRS/Suputin will be able to tell you where they got theirs...

Does this make me reliable or predictable? Our reamer came from Dave Manson.
 
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