Equipment & Gear > Guns and Ammo

Bullet Seating Depth

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Schwag173:
 [/quote]
Just to make sure I"m understanding you correctly: If you left your seater die set from loading 175gr bullets and then seated 165gr bullets, wouldn't the OAL be the same? If so, I guess you're saying that the 165s were seated out as far as the 175s?
Or are you saying you seated the 165s just as deep into the case so the OAL was less leaving a jump to the lands?
Please clarify for me. I'm a little slow this morning.
[/quote]

The die had been adjusted for the conical-shaped Hornady 175s.  The plumper shape (ogive) of the 165 Sierra Gamekings caused them to be seated much deeper than intended.  The result was a short COL. 

JackOfAllTrades:

--- Quote from: Schwag173 on March 22, 2011, 04:28:39 AM --- The result was a short COL. 
--- End quote ---

Finding a more accurate load by accident is not our goal as reloaders. Let this be an eye opener to readers here; Measure your first round of a new recipe, (once changing anything from a previous bullet/component from the previous loading operation), and consult your load book before loading a potentially hazardous situation.

-Steve

sakoshooter:

--- Quote from: Schwag173 on March 22, 2011, 04:28:39 AM --- 
--- End quote ---
Just to make sure I"m understanding you correctly: If you left your seater die set from loading 175gr bullets and then seated 165gr bullets, wouldn't the OAL be the same? If so, I guess you're saying that the 165s were seated out as far as the 175s?
Or are you saying you seated the 165s just as deep into the case so the OAL was less leaving a jump to the lands?
Please clarify for me. I'm a little slow this morning.
[/quote]

The die had been adjusted for the conical-shaped Hornady 175s.  The plumper shape (ogive) of the 165 Sierra Gamekings caused them to be seated much deeper than intended.  The result was a short COL. 
[/quote]


Gotcha. I assumed by your earlier post that you were shooting 'like' bullets of slightly different weights in which the ogives would be very similar.

I'm not saying that the 'rod down the barrel' idea is better than a bullet chambering tool. I just said you could do it with for cheap with what's laying around the house and be pretty darn accurate also.
The ogive is taken into consideration with the 'rod down the barrel' because you're doing your measuring(for every different bullet)with the bullet's ogive slightly touching the lands.

NRA4LIFE:
For my bolt actions I will color the bullet with a sharpie and work the seat down so the bullet is just touching the lands.  With much experimentation, I have found in my Brownings that is the optimum seating.  Unfortunately that did not work in my BAR as the overall length of the shell was too long and they did not cycle properly.  Those I seat in the cannelure and crimp.

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