ffgats Posted October 31, 2013 Share Posted October 31, 2013 I know Im not the only one that loves to shoot their AR's but hate to reload the ammo, I dont mind the main loading part, but its the case preparation. Mind you I got a Giraud Trimmer. My question is or my plans is to TRIM THE CASE to almost its minimum 1.740 so I can still have 3-4 reloads before the next trimming. My only concern about this lenght is there might some issues of escape gas and my accuracy will suffer, RCBS with their XDIE recommends this lenght. any feedback is welcome. thanks Link to comment Share on other sites More sharing options...
zmanktm Posted October 31, 2013 Share Posted October 31, 2013 One problem with not trimming ever time is if you pick up a piece of range brass and its long and you load it will likely malfunction at the worst possible time. I trim with a Dillon trimmer every time I load 223. Link to comment Share on other sites More sharing options...
blairmckenzie1 Posted October 31, 2013 Share Posted October 31, 2013 I do my best to trim every time. I work in batches. I trim to 1.750 Link to comment Share on other sites More sharing options...
Alaskapopo Posted October 31, 2013 Share Posted October 31, 2013 I run them through my Dillon trimmer every time because I pick up range brass.Pat Link to comment Share on other sites More sharing options...
deanq Posted October 31, 2013 Share Posted October 31, 2013 I run them through my Dillon trimmer every time because I pick up range brass. Pat Ditto, trim & swage each batch. It doesn't add any time to swage, so I do. Worth it in the log run. DQ Link to comment Share on other sites More sharing options...
pjb45 Posted November 1, 2013 Share Posted November 1, 2013 I had a bunch of .223 brass. First I culled out LC v. all other brass. I measured the length of all the LC. Next i trimmed with a Dillon trimmer all the long brass. Since this was LC, I swaged the brass. What a PIA-- so I said &@*$*@* and called Top Brass. I sent in all my brass. I should receive my 1000 rounds of processed brass tomorrow. Brass prep is just not my cup of tea. Link to comment Share on other sites More sharing options...
ffgats Posted November 1, 2013 Author Share Posted November 1, 2013 Range Brass, never thought of this, I do pick up my brass. Any comment on the 1.740 lenght, its still above the min. of 1.730, any risk of escape gasses? Link to comment Share on other sites More sharing options...
Doc Hunter Posted November 1, 2013 Share Posted November 1, 2013 (edited) Trim every time. The most important part of a rifle case is the neck. Edited November 1, 2013 by Doc Hunter Link to comment Share on other sites More sharing options...
Alaskapopo Posted November 2, 2013 Share Posted November 2, 2013 Range Brass, never thought of this, I do pick up my brass. Any comment on the 1.740 lenght, its still above the min. of 1.730, any risk of escape gasses? Maybe I am confused but the min trim to length is 1.750 not 1.730. Pat Link to comment Share on other sites More sharing options...
warpspeed Posted November 2, 2013 Share Posted November 2, 2013 SAMMI for 223 Rem is 1.760" Sierra lists the trim length @ 1.750" the only harm with going shorter is the loss of neck tension. The neck starts at 1.557 so at SAMMI you have 0.203". TTL @ 1.750 drops it to 0.193 or 5 %. 1.740 would bring it to 0.183 or 10% less. I don't think the gasses will be an issue but neck tension could. Trim a couple, like 30, and see if the accuracy suffers. Link to comment Share on other sites More sharing options...
ffgats Posted November 2, 2013 Author Share Posted November 2, 2013 Correct me if Im wrong,not 100% on this, The SAAMI max case lenght (223 REM) is 1.760max -.030 min. which would translate to 1.730.00. Maybe Im missing something here? Link to comment Share on other sites More sharing options...
Steve RA Posted November 2, 2013 Share Posted November 2, 2013 I believe he is saying that you could experiment with a couple @ 1.730 if you wished to see how they might retain the bullet and also check the accuracy. His point is that the SAAMI length is stated as 1.760 but that Sierra shows a trim length of 1.750 which would allow ten thousandths for growth. Link to comment Share on other sites More sharing options...
Alaskapopo Posted November 2, 2013 Share Posted November 2, 2013 (edited) I had some cases a while back that I had trimmed too short by accident when I was setting up my 1200 trimmer they were 1.742 or so and they had almost no neck tension. I am not sure where you are getting 1.730 as all the manuals I have list it at 1.750 and I just searched on line and saw the same. Pat Edited November 2, 2013 by Alaskapopo Link to comment Share on other sites More sharing options...
ffgats Posted November 2, 2013 Author Share Posted November 2, 2013 I believed it was ONE of the SAAMI SPECS DRAWING Link to comment Share on other sites More sharing options...
ffgats Posted November 2, 2013 Author Share Posted November 2, 2013 www.saami.org/pubresources/cc_drawings/Rifle/223Remington.pdf I always trimmed brass to 1.75 as mentioned before if I can get away of trimming every shooting it would be great. Link to comment Share on other sites More sharing options...
warpspeed Posted November 3, 2013 Share Posted November 3, 2013 I believe he is saying that you could experiment with a couple @ 1.730 if you wished to see how they might retain the bullet and also check the accuracy. His point is that the SAAMI length is stated as 1.760 but that Sierra shows a trim length of 1.750 which would allow ten thousandths for growth. I was saying you could try to trim to 1.740 and see what you get. Link to comment Share on other sites More sharing options...
hpnewby Posted November 3, 2013 Share Posted November 3, 2013 It could be my imagination, but letting cases go to .750-55 improved accuracy over .730ish. I was after the same thing - more loads per trim. What I found to be better than that was reducing FL sizing as much as MY chamber would allow to reduce growth after each load cycle. I can't even measure the difference between length in some cases after they've been shot and sized multiple times. Also extends the life if brass by preventing work hardening. Link to comment Share on other sites More sharing options...
gigs Posted December 4, 2013 Share Posted December 4, 2013 A lot of Federal FC headstamp brass runs 1.730-1.740 even after firing. I still run it through my trimmer when I'm processing, but only one in 10 cases or less is over 1.750. My dad shot competitive bench rest for a while and always trimmed 0.010 below the recommended trim-to length so he would only have to do it once (he did win quite often as well). So bottom line I'd say ... don't worry about it. Link to comment Share on other sites More sharing options...
dauntedfuture Posted December 4, 2013 Share Posted December 4, 2013 I trim to 1.755 on a girud with every piece of brass every time. This way im not trimming as much as i would to get to 1.750. It does make a difference in time and effort over 1000's of pieces of brass. Link to comment Share on other sites More sharing options...
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