Case trim length
- Thread starter West Calamus
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What bore scope do you use? That's a great picture.
baldhunter
Well-Known Member
Teslong semi rigid cable model connected to my laptop
Thank you Sir.
As long as you always trim them to the same lenght it doesntr matter much.Except by trimming back to theminimum you give up a bit of the long neck accuraccy. Since I trim after each firing I trim to about 85% of maximum neck length.
Straight Shooter
Well-Known Member
Since I got my Teslong I found out that I have a lot of gap between the end of my brass and the end of my chambers. Don't want to trim if I don't have to. Been trimming for years when I didn't need to.
I set up and determine what the case length is going to be. After each firing. I clear up my cases, anneal, size, and re-set the length. That being a Gen-3 for cutting the case length. That way they are all the same length all the time. This changes I make this last year. I done a lot of reading about case length. Better to have them all the same length all the time. All the case prep helps in getting better loads. More constant loads. It all goes back to what you want out of your reloads. Under 500 yds it probable doesn't make that much difference. There is so much here at Long Range Hunting to read about and go over and over. 
I did fine for years, but I held my shots to about 500yds. Let my scope tell me what the range was. I knew my rifle and what it would do. I didn't use a range finder until I change to a bow. There you better know what it really is. A few yards can make a big different. I have a wildcat rifle that I am going to the field next year for P. dogs. I am looking ranges of 600 to 800 yards. probable not shoot under 400 yds. It wouldn't be fair. I'll have a grandson to do the close work. 
I did fine for years, but I held my shots to about 500yds. Let my scope tell me what the range was. I knew my rifle and what it would do. I didn't use a range finder until I change to a bow. There you better know what it really is. A few yards can make a big different. I have a wildcat rifle that I am going to the field next year for P. dogs. I am looking ranges of 600 to 800 yards. probable not shoot under 400 yds. It wouldn't be fair. I'll have a grandson to do the close work. I set my Guraud trimmer up and all my 375 Cheytac get trimmed to to 3.0275.I set up and determine what the case length is going to be. After each firing. I clear up my cases, anneal, size, and re-set the length. That being a Gen-3 for cutting the case length. That way they are all the same length all the time. This changes I make this last year. I done a lot of reading about case length. Better to have them all the same length all the time. All the case prep helps in getting better loads. More constant loads. It all goes back to what you want out of your reloads. Under 500 yds it probable doesn't make that much difference. There is so much here at Long Range Hunting to read about and go over and over.
RD57
Well-Known Member
I trim to .003" less than chamber length. When I started reloading at 13 years of age with my Dad I trimmed to the recommended in the manuals. When I entered the military I took some of the 5.56 brass from the range to measure out chamber size and compare it to my 1976 Mini-14 fired brass. I thought military brass was crap, it was all over the place from 1.755" - 1.771". Then using the unit armorer's bore scope with a fired piece of brass in the chamber I saw that there was still a little bit of room in the neck for a little more neck length. It was a "lightbulb moment" for me, so now I trim my brass for the particular rifle it gets shot in, I let it grow until it needs trimming and it only gets trimmed a few thousands under. It does help keep the carbon fouling out of the neck area and it gives you more bullet grip for short necked rounds like the .223/5.56, .243, etc. SAAMI chamber dimension diagrams will give you an idea of what to expect.
Frank in the Laurels
Well-Known Member
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- Jul 15, 2007
- Messages
- 1,753
.01 rule works just fine for all hunting rifles...about half that in my PPC's, BR's and DASHERS.
BrentM
Well-Known Member
Easiest method to determine trim length is with a gauge. Super simple and accurate. Once you understand the amount of room you have to work with, the only thing you need to be concerned with is your chambers max length and consistency in your trim. Most people could spend more time learning how to better control neck tension vs worrying about length but it's a game of sums.
www.sinclairintl.com
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www.sinclairintl.com
Yep, they work great.Easiest method to determine trim length is with a gauge. Super simple and accurate. Once you understand the amount of room you have to work with, the only thing you need to be concerned with is your chambers max length and consistency in your trim. Most people could spend more time learning how to better control neck tension vs worrying about length but it's a game of sums.
SINCLAIR INTERNATIONAL Products for Sale Online - 237 Products
237 SINCLAIR INTERNATIONAL Products For Sale Up To 91% Off including Reloading, Tools & Cleaning, and Gear.
Mikecr
Well-Known Member
Why do you bring back a 2yr old (and already big) thread?
This is exactly how I think about it. If you measure and trim each reloading, I see no reason not trim just under max length.
