What is case trim length?

Asked By: Alimou Moragas | Last Updated: 28th May, 2020
Category: business and finance aviation industry
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The "trim to" length is the length of the case only. Max length is the maximum length of the assembled round. In a . 45 ACP it's about 1.250 inches and a . 223 is about 2.26 inches.

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Likewise, how important is case trim length?

Case length does not affect powder capacity, at least not that it can be "remedied/restored" by trimming. Case neck holds bullet, not powder. The only reason to trim is to assure that brass has not moved into neck pushing neck length beyond the chamber dimension.

Additionally, what is the trim length for 6.5 Creedmoor?

6.5mm Creedmoor
Case length 1.920 in (48.8 mm)
Overall length 2.825 in (71.8 mm)
Case capacity 52.5 gr H2O (3.40 cm3)
Rifling twist 1-8" (203 mm)

Just so, do you trim cases before or after resizing?

The main reason for trimming is so your case isn't too long for your chamber. There is "1" exception. That is if you're using the X-Dies. In that case you trim once before sizing and then you never trim again.

What length should I cut .223 brass?

The Max case length for the 223 is 1.760 inches. The trim to length is 1.750 inches. If you actually trimmed your brass to 1.45-1.50 you would have no neck left. The junction between the shoulder and the neck measures 1.557 inches.

12 Related Question Answers Found

Is Case trimming necessary?

There is no set rule as to how often cases should be trimmed to length. Some calibres will need trimming more frequently than others. If you are using a 'pokey' load, and by that I mean a load that is near the top end of the pressure range, brass tends to flow more and so the cases will need trimming sooner.

Does once fired brass need to be trimmed?

If the cases measure less than the maximum, trimming is not necessary. Measuring is a must, though, which you did, tkill. To be safe, don't assume once fired rifle brass (or twice fired, three times, etc.) does not need trimming at each reloading cycle.

Do you anneal before or after resizing?

You should anneal before sizing. Work hardened brass "springs" back more after the expander ball opens up the neck. Annealing before sizing help ensure more consistent neck tension.

What caliber is 6.5 Creedmoor?

The 6.5 Creedmoor cartridge is essentially, an Americanized version of the 6.5x55mm Mauser round that fits into almost anything that's sized to fit a . 308 Winchester/7.62x51mm.

When was the 6.5 Creedmoor invented?


Introduced by Hornady in 2007, the 6.5 Creedmoor quickly became the darling of precision rifle shooters around the country.

Do you trim .223 brass?

The SAAMI specification for . 223 brass is 1.760" +0.000/-0.020. In other words, 1.740" to 1.760". Case trimming by manufacturers isn't very precise, so they generally aim for the middle point, 1.750" to have maximum available error.

What is the case length of a 223?

.223 Remington
Case length 1.76 in (45 mm)
Overall length 2.26 in (57 mm)
Rifling twist 1 in 12 inch (military-style rifles use 1:7 to 1:10 to stabilize longer bullets)
Primer type Small rifle