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W.T.F.
Discussion regarding the reloading of ammunition and tuning of loads for accuracy
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tikkat3
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PostPosted: Mon Feb 02, 2015 1:56 pm    Post subject: Re: W.T.F. Reply with quote

Elvis wrote:
.277 IS 7mm you lot with yah .284s are the odd ones out Poke Poke

Not to those who created it
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PaulS
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PostPosted: Mon Feb 02, 2015 8:55 pm    Post subject: Re: W.T.F. Reply with quote

.277 is for 270 and 284 is for 7mm
Unless your 270 is real worn... Smile

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Pumpkinslinger
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PostPosted: Mon Feb 02, 2015 9:03 pm    Post subject: Re: W.T.F. Reply with quote

Cartridge names sure got confusing! A .38 Special uses a 0.357" diameter bullet but a .38-40 uses a 0.4" diameter bullet. What were those guys drinking??

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PaulS
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PostPosted: Mon Feb 02, 2015 9:35 pm    Post subject: Re: W.T.F. Reply with quote

The 38 S&W uses a .361" diameter bullet. ????

I have a box for sale - Winchester Super X 38 S&W nickel cases and lead 145 grain bullets - factory new ammo (about twelve years ago).

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Elvis
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PostPosted: Mon Feb 02, 2015 11:22 pm    Post subject: Re: W.T.F. Reply with quote

PaulS wrote:
.277 is for 270 and 284 is for 7mm
Unless your 270 is real worn... Smile

nope I do use .277 but shes probably loose enough to fit the extra 7 thou without blowing up...not that I will try it..wouldnt want to be seen slumming it with the "metric" lot Very Happy Very Happy Very Happy

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MacD
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PostPosted: Tue Feb 03, 2015 9:16 am    Post subject: Re: W.T.F. Reply with quote

Yes it gets really confusing. Between the military and marketers no wonder. Then you have the many non US calibres given in land rather than bore diameter. Then some are given using bullet diameter which is larger again. I bought some cast, checked 180 grain bullets that measure. 311-.312. Of course it is obvious they are for a. 303 British or then again maybe a 7.62x52R or 7.62x39 both which are actually 7.92. Ever heard of using a. 308 bullet which is also used in the 7.62 NATO but actually measures 7.8mm in a 7.5mm Swiss which normally is loaded with a 7.7mm bullet.

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Aloysius
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PostPosted: Tue Feb 03, 2015 10:09 am    Post subject: Re: W.T.F. Reply with quote

not to forget the sabots so you can put a .224 bullet in a .308 round...
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Bushmaster
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PostPosted: Tue Feb 03, 2015 10:54 am    Post subject: Re: W.T.F. Reply with quote

Aloy just had to add that one more twist to the story.

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chambered221
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PostPosted: Tue Feb 03, 2015 5:33 pm    Post subject: Re: W.T.F. Reply with quote

I'll play along !!!

.429 bullet for a 44 mag...... same reason a 44-40 uses a .427 bullet.
At one time they used the O.D. of the loaded cartridge as it's designation.

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Elvis
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PostPosted: Wed Feb 04, 2015 12:36 am    Post subject: Re: W.T.F. Reply with quote

.303 brit is .312 barrel as .303 from land to land but .312ish groove to groove.
7.62x39mm is from .308 (rugers) through to .312 with most being .311

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Elvis
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PostPosted: Tue Feb 17, 2015 2:43 am    Post subject: Re: W.T.F. Reply with quote

tikkat3 wrote:
Elvis wrote:
.277 IS 7mm you lot with yah .284s are the odd ones out Poke Poke

Not to those who created it

finally found my calipers and measured up the .277 projectiles and YES they are exactly 7mm in diameter Very Happy Very Happy Very Happy

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Aloysius
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PostPosted: Tue Feb 17, 2015 3:54 am    Post subject: Re: W.T.F. Reply with quote

Elvis wrote:
tikkat3 wrote:
Elvis wrote:
.277 IS 7mm you lot with yah .284s are the odd ones out Poke Poke

Not to those who created it

finally found my calipers and measured up the .277 projectiles and YES they are exactly 7mm in diameter Very Happy Very Happy Very Happy


at what temperature? Smile
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Bushmaster
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PostPosted: Tue Feb 17, 2015 10:01 am    Post subject: Re: W.T.F. Reply with quote

Aloysius is at it again... Razz

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PaulS
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PostPosted: Tue Feb 17, 2015 12:19 pm    Post subject: Re: W.T.F. Reply with quote

Mathmatically 7 millimeter = 0.275 590 551 18 inch

However 7mm bullets are all .284" in diameter and 270 calibere bullets are .277"

7mm bullets are .009" larger than the 'bore' diameter and 270 bullets are only .007" larger than bore diameter. 30 and 35 caliber bullets are in the middle at .008" larger than bore diameter. There doesn't seem to be any real method to the madness of bullet size as it relates to bore diameter.

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Paul
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Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
So and So's pages on the internet = NOT reliable loading data
Always check data against manuals
NEVER exceed maximum listed loads
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Bushmaster
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PostPosted: Tue Feb 17, 2015 1:24 pm    Post subject: Re: W.T.F. Reply with quote

It's whatever you can squeeze down the barrel...

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DEMOCRACY Two wolves and one sheep voting on what to have for lunch...
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