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Max Online: 16728 @ 03/25/12 08:51 AM
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#5503950 - 12/28/14 10:00 AM Favorite method for measuring bullet seating depth?
10ring Offline
Tracker

Registered: 11/19/12
Posts: 840
Loc: Pilot Point, TX
Wondering what methods others use for measuring seating depth and finding the lands? I use an old Stony Point set and it seems to work "ok". It seems using a simple "dummy round" with a slit cut in the neck allowing the bullet to slide works best but yet I still wonder what better methods are out there?

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#5503954 - 12/28/14 10:03 AM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
dee Offline
Extreme Tracker

Registered: 04/10/10
Posts: 4665
Loc: Red River way
I use the modified case like you mentioned.
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#5503962 - 12/28/14 10:06 AM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6220
Loc: Wise Co.
I see no way the split-neck method can be beat. About the only way you can go wrong is using a poorly dimensioned comparator or a junk caliper for measuring.
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#5503966 - 12/28/14 10:08 AM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
10ring Offline
Tracker

Registered: 11/19/12
Posts: 840
Loc: Pilot Point, TX
I was thinking about pouring chamber castings and taking measurements off of that. Would that be worth the trouble?

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#5503967 - 12/28/14 10:10 AM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6220
Loc: Wise Co.
IMO, negative.
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Originally Posted By: Cleric
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#5504028 - 12/28/14 10:51 AM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
ChadTRG42 Online   happy
THF Trophy Hunter

Registered: 09/16/09
Posts: 9425
Loc: Lewisville, TX
Simple, seat the bullet long, and chamber check. If it won't chamber, seat deeper and rechamber check. I do this to find the lands on all my rifles I load for. It takes me about 3-5 rounds to find it right where I want it. Look for slight rifling marks left on the ogive of the bullet and you know you are touching.
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#5504046 - 12/28/14 11:02 AM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
headhunter54 Offline
Tracker

Registered: 07/07/11
Posts: 577
Loc: Longview, TX
I do as Chad described except remove the firing pin. Seat long and try to close bolt gently. If it won't close seat another .005 and retry until a soft close. Then you can play .001 or .002 at a time.
Don't know if it is the right way but I am unsure of the Stoney Point tool if I am jamming to hard or missing by stopping at the first resistance I feel.

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#5504131 - 12/28/14 11:48 AM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 20293
Loc: Texas
I use the split case, that said will verify with the way Chad described. Then sometimes seat the bullet deeper so it will cycle reliably through the mag. Some rifles you just cannot seat a bullet touching the lands and still have reliable functioning.

Weatherby rifles forget seating to the lands, unless you want a single shot.
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#5504366 - 12/28/14 01:35 PM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Split neck, seat one long, measure to the ogive, write it down, chamber the round, write down what it was pushed to. Adjust the seater die to seat the bullet a bit deeper, repeat about five times. By the time I'm done I should have the slightest rifling marks on the bullet. This is where I call it "even" and I jump or jam from that ogive measurement.
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#5505950 - 12/29/14 09:25 AM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
vanguard Offline
Veteran Tracker

Registered: 01/11/10
Posts: 3230
i use a cleaning rod with a blunted jag, i have two collets that lock on to the rod.
insert till it touches the bolt slide collet up to end of barrell and tighten. remove bolt insert bullet and have another cleaning rod hold that in place insert other collet on cleaning rod insert rod to it touches bullet, slide collet up to barell and tighten. now i measure inside of collet plus .75 which is the thickness of my collet. its easy and fast no guessing.
if you cant get collets made just use a razor blade placed flately against end of barrell and slightly scratch cleaning rod, measure both scratches .
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#5505956 - 12/29/14 09:26 AM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
vanguard Offline
Veteran Tracker

Registered: 01/11/10
Posts: 3230
no need to split necks if you have a neck sizing die, just put enough tension on neck to hold bullet.
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#5506293 - 12/29/14 12:01 PM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
tth_40 Offline
THF Celebrity

Registered: 04/05/10
Posts: 13737
Loc: North Texas.
I use the Hornady Comparator. Usually take 4-5 measurements. Fast and easy.
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#5509750 - 12/30/14 09:24 PM Re: Favorite method for measuring bullet seating depth? [Re: 10ring]
Precision_Shooter Online   content


Registered: 02/18/09
Posts: 825
Loc: Crossroads, TX
Split neck method here...
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