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Reloading Berger Bullets


Case Trimming

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Unread 01-11-2013, 06:19 PM
Junior Member
Join Date: Jan 2013
Posts: 9
Case Trimming

How important is case trimming if your shooting a single shot like an encore?

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Unread 01-11-2013, 06:32 PM
Platinum Member
Join Date: Jul 2004
Location: Texas
Posts: 6,170
Re: Case Trimming

Originally Posted by HardtimeNC View Post
How important is case trimming if your shooting a single shot like an encore?

Trimming is part of the consistency effort and can greatly effect the Standard Deviation of the
load (It aids in accuracy).

Proper sizing and trimming maintains consistant bullet grip also.

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Unread 01-11-2013, 08:25 PM
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Join Date: Feb 2011
Location: Cincinnati, Ohio
Posts: 2,079
Re: Case Trimming

What he said!!
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Unread 01-13-2013, 07:33 AM
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Join Date: Dec 2005
Location: Tucson Az
Posts: 1,699
Re: Case Trimming

Once you have your cases the same length you may find that you won't have to trim them for many firings. All the chambers I have measured from custom to factory have chamber necks that are quite a bit longer than the case. It can very long in factory chambers and somewhat shorter in custom chambers. Naturally if you have the chamber dimensions you can do easily determine the end of the chamber and trim accordingly.

Even with the chamber dimensions I like to measure to absolutely know when the case neck is going make contact with the end of the chamber. You can do this with a sinclair chamber length plug or if you have a lathe you can easily made your own.

Varmint Al's webpage has a discussion as well as chamber plug dimensions, thanks Al:

Varmint Al's Handloading/Reloading Page
Varmint Al's Mini Lathe Page

Sinclair video that shows the chamber length gauge being used:

Sinclair chamber length gauge | World's Largest Supplier of Firearm Accessories, Gun Parts and Gunsmithing Tools - BROWNELLS
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Unread 01-14-2013, 11:42 AM
Silver Member
Join Date: Mar 2012
Location: New germany, NS
Posts: 426
Re: Case Trimming

useing a single shot like that for hunting and once and a while plinking thats up to you. But, if you are long range shooting or want to put that bullet exactly where you want every time then you may want to take the time to remove as many variables as you can. Sise, trim, clean the brass every load, weigh every charge and seat to exact OAL every load.
That is the best about reloading you get what you put into it
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