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Max Online: 16728 @ 03/25/12 08:51 AM
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#7071133 - 02/08/18 04:11 PM BUMPING THE SHOULDER
DLALLDER Online   content
Veteran Tracker

Registered: 11/23/05
Posts: 3218
Loc: Pittsburg, Texas
I have grown tired of guessing the amount of bumping the shoulder when sizing. How do the gurus do it and how do you measure the actual amount you have moved the shoulder? In the past I set die to touch the brass and then moved die in about 1/8 of a turn. Thanks
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#7071153 - 02/08/18 04:26 PM Re: BUMPING THE SHOULDER [Re: DLALLDER]
jeffbird Online   content


Registered: 03/09/09
Posts: 2688
Here is all you need. Very well worth the cost.

https://www.midwayusa.com/product/479704...with-comparator

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#7071176 - 02/08/18 04:45 PM Re: BUMPING THE SHOULDER [Re: DLALLDER]
garyrapp55 Offline
Tracker

Registered: 12/26/11
Posts: 528
Loc: Ft. Worth
That is the kit I got and it works great. Measure a fired case then adjust your die to the desired amount. Usually .001-.003"

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#7071199 - 02/08/18 05:00 PM Re: BUMPING THE SHOULDER [Re: DLALLDER]
ChadTRG42 Offline
THF Celebrity

Registered: 09/16/09
Posts: 12160
Loc: Lewisville, TX
The Hornady kit is what I also use.

If you want to redneck engineer it, take a 40 S&W or 45 ACP case, and use that. I used one of these for a bit. Make sure the case mouth is perfectly round. Insert the case mouth of the rifle round into the case mouth of the 40 or 45 case. The pistol case mouth will sit on the shoulder of the rifle case. Take a few measurements of fired cases, which should all be the same. Then, size you brass in small increments until you get some shoulder movement. It works if you have a perfectly round pistol case.
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#7071360 - 02/08/18 06:52 PM Re: BUMPING THE SHOULDER [Re: DLALLDER]
DLALLDER Online   content
Veteran Tracker

Registered: 11/23/05
Posts: 3218
Loc: Pittsburg, Texas
Chad, will the 40 or 45 case work on all cal. rifles?
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#7071366 - 02/08/18 06:54 PM Re: BUMPING THE SHOULDER [Re: DLALLDER]
Deans Offline
Bird Dog

Registered: 12/23/06
Posts: 499
Loc: Magnolia,TX
I use Redding Competition shell holders and the Hornady comparator set.
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#7071394 - 02/08/18 07:12 PM Re: BUMPING THE SHOULDER [Re: DLALLDER]
ChadTRG42 Offline
THF Celebrity

Registered: 09/16/09
Posts: 12160
Loc: Lewisville, TX
Originally Posted By: DLALLDER
Chad, will the 40 or 45 case work on all cal. rifles?


Just about.
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#7072226 - 02/09/18 01:12 PM Re: BUMPING THE SHOULDER [Re: ChadTRG42]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 22535
Loc: Texas
Originally Posted By: ChadTRG42
Originally Posted By: DLALLDER
Chad, will the 40 or 45 case work on all cal. rifles?


Just about.


Those work for lots of cases. Some others I have used 9mm, 38 special and 32 H&R Mag. On the SAAMI web page you can find the datum point on the shoulder used for measuring head space. The cartridge will not match it exactly but I like to choose a cartridge case close to that that measurement value is. Remember we are looking for the difference between fired and resized so using a case will not match SAAMI but doesn't matter is we are looking to bump back the shoulder .002 or .004 inches
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#7072284 - 02/09/18 02:05 PM Re: BUMPING THE SHOULDER [Re: DLALLDER]
Buzzsaw Online   content
THF Celebrity

Registered: 06/29/11
Posts: 11474
Loc: Frisco, Texas
hey Chris, great to see you on the forum
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#7072315 - 02/09/18 02:28 PM Re: BUMPING THE SHOULDER [Re: kmon1]
redchevy Offline
THF Celebrity

Registered: 10/25/04
Posts: 27327
Loc: Texas
Originally Posted By: kmon1
Originally Posted By: ChadTRG42
Originally Posted By: DLALLDER
Chad, will the 40 or 45 case work on all cal. rifles?


Just about.


Those work for lots of cases. Some others I have used 9mm, 38 special and 32 H&R Mag. On the SAAMI web page you can find the datum point on the shoulder used for measuring head space. The cartridge will not match it exactly but I like to choose a cartridge case close to that that measurement value is. Remember we are looking for the difference between fired and resized so using a case will not match SAAMI but doesn't matter is we are looking to bump back the shoulder .002 or .004 inches


Thanks for sharing was about to ask about using 9mm.
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#7072330 - 02/09/18 02:42 PM Re: BUMPING THE SHOULDER [Re: ChadTRG42]
garyrapp55 Offline
Tracker

Registered: 12/26/11
Posts: 528
Loc: Ft. Worth
Originally Posted By: ChadTRG42
If you want to redneck engineer it, take a 40 S&W or 45 ACP case, and use that. I used one of these for a bit. Make sure the case mouth is perfectly round. Insert the case mouth of the rifle round into the case mouth of the 40 or 45 case. The pistol case mouth will sit on the shoulder of the rifle case. Take a few measurements of fired cases, which should all be the same. Then, size you brass in small increments until you get some shoulder movement. It works if you have a perfectly round pistol case.


Dang Chad, I didn't know your neck was that red! I redneck stuff too but that never even crossed my mind.

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#7072331 - 02/09/18 02:45 PM Re: BUMPING THE SHOULDER [Re: garyrapp55]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 23316
Loc: Wolfe City, TX
Originally Posted By: garyrapp55
Originally Posted By: ChadTRG42
If you want to redneck engineer it, take a 40 S&W or 45 ACP case, and use that. I used one of these for a bit. Make sure the case mouth is perfectly round. Insert the case mouth of the rifle round into the case mouth of the 40 or 45 case. The pistol case mouth will sit on the shoulder of the rifle case. Take a few measurements of fired cases, which should all be the same. Then, size you brass in small increments until you get some shoulder movement. It works if you have a perfectly round pistol case.


Dang Chad, I didn't know your neck was that red! I redneck stuff too but that never even crossed my mind.


Pffft, Chad is an old hand with bailing wire and duct tape.
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#7072349 - 02/09/18 02:58 PM Re: BUMPING THE SHOULDER [Re: DLALLDER]
ChadTRG42 Offline
THF Celebrity

Registered: 09/16/09
Posts: 12160
Loc: Lewisville, TX
<<< MacGyver was my idol!
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Custom and Precision Ammunition!!
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