col for field brass in .223.

[gun'sRgood]

I'm trimming the brass to 1.76 except that a lot of the field brass is already short. 1.745 being the shortest. Most all the brass does not need to be trimmed. But, with the different lengths won't I be having various COL's? Or am I going to end up with various seating depths to maintain the same COL? Trimming everything to the shortest seems wrong but what do ya do with all the different brass lengths?

 

[jak67429]

For accuracy loads I trim everything to trim to length. if you just loading plinking ammo with ball unless the brass is really short it won matter.

 

[EricBu]

I'm trimming the brass to 1.76 except that a lot of the field brass is already short. 1.745 being the shortest. Most all the brass does not need to be trimmed. But, with the different lengths won't I be having various COL's? Or am I going to end up with various seating depths to maintain the same COL? Trimming everything to the shortest seems wrong but what do ya do with all the different brass lengths?

I trim all of my to 1.74, all the time. It's especially warranted if you get collet crimped mil brass in the mix and the mouth has britilized some. Plus, it makes for better consistency to have it all the same, and 1.74 will catch almost all your brass. Also, sticking to 1.74....you'll likely lose it before you ever have to trim it again...

 

[Varminterror]

No, you will not have varying COL’s due to varying case length. Seating dies don’t care about case length unless you’re (foolishly) crimping - and even then, only the crimp will vary, not the COL.

 

[AJC1]

The reference surfaces for coal are the base of the cartridge and the tip of the bullet. The die pushes just slightly down from the tip but basically what happens in the middle is a function of trim not anything your doing on the press. Field ammo is affectionately referred to as blamo round here. A simple way to know is if your buying fmj....

 

[gun'sRgood]

No, you will not have varying COL’s due to varying case length. Seating dies don’t care about case length unless you’re (foolishly) crimping - and even then, only the crimp will vary, not the COL.

Yeah, Makes sense and thx! So with the various crimps, various ...? Everything? Is the sage advice to just trim everything to the same? Or for plinking practice it doesn't really matter? What would you expect? A sub MOA with range reloads now shoots a ?

 

[Varminterror]

1) Don’t crimp 223 loads

2) No, slightly varying trim length won’t hurt your precision, but you also have the opportunity to trim everything to the same length - albeit it’ll probably be relatively short. A few thou difference in trim length won’t throw a sub-MOA load over the cliff… but once your case lengths exceed max length, trim all to length.

 

[Bartojc]

I always trim to min so I have a consistent starting point. Once something gets too long I do the whole batch again to min. Some get trimmed some do not.

As has been stated trim length has nothing to do with COL.

Jeff

 

[gun'sRgood]

1) Don’t crimp 223 loads

2) No, slightly varying trim length won’t hurt your precision, but you also have the opportunity to trim everything to the same length - albeit it’ll probably be relatively short. A few thou difference in trim length won’t throw a sub-MOA load over the cliff… but once your case lengths exceed max length, trim all to length.

Thanks, I hope I someday get the opportunity to see you shoot.

 

[gun'sRgood]

I always trim to min so I have a consistent starting point. Once something gets too long I do the whole batch again to min. Some get trimmed some do not.

As has been stated trim length has nothing to do with COL.

Jeff

Yup, that's where i am. Thx

 

[74man]

According to the SAMMI drawings, the ..223 Rem is trimmed from 1.760 - .030 so that means 1.730 to 1.760. Trim where you want if you want to make them all the same.

 

[gun'sRgood]

According to the SAMMI drawings, the ..223 Rem is trimmed from 1.760 - .030 so that means 1.730 to 1.760. Trim where you want if you want to make them all the same.

Thx. Males sense.

 

[Varminterror]

Best method is to actually measure your chamber and trim to match your actual chamber neck, rather than an arbitrary book value.

 

[DMW1116]

For cases longer than 1.75”, I trim them. I use a Lee lock stud and trimming guide rod so I don’t have the adjustment to go shorter. I find a lot of range brass is down around the 1.743 to 1.749 inch range, so it doesn’t get trimmed. Between reloading and shooting, I figure I’m making way bigger mistakes than a 0.007” difference in case length.

For testing different loads I separate out the cases lower than 1.75” and keep the same head stamps. Once I find a load, I trim what needs to be trimmed, bevel and deburr all cases and load them. I have a few loads that shoot really tight but I also have a few that are 2.5-3 MOA. I shoot them all. If I miss I get a bigger target or get closer.

 

[Blue68f100]

I use a drill press type cutter (3way) and fine it easier to just trim them all (1.750") than to measure them. Quicker to just feed the cutter and not worry about sorting them trimming.

 

[gun'sRgood]

I use a drill press type cutter (3way) and fine it easier to just trim them all (1.750") than to measure them. Quicker to just feed the cutter and not worry about sorting them trimming.

If my brain lets me, I'll show you a pic of my process. I'm trying to batch up at least 1K of these and really want to get them right. When the final product is done., or the first twenty of so, I'll go out and see if it's oh happy day or just stick to pistol reloading. Thanks Blue!

 

[AJC1]

If my brain lets me, I'll show you a pic of my process. I'm trying to batch up at least 1K of these and really want to get them right. When the final product is done., or the first twenty of so, I'll go out and see if it's oh happy day or just stick to pistol reloading. Thanks Blue!

Make 10 and test them... making 1000 then testing is asking Murphy to join the party.

 

[Walkalong]

Begging

 

[gun'sRgood]

Yep, as mentioned, about twenty or so to check. I've got this problem in the past, the new rounds fit flush in the block and yet get stuck without firing? Probably one of those things where you'd have to be here to see the whole pic. I'll be watching these. Until that time, Thanks guys! Let ya'll know.