If over all case length is below max. I love little league baseball-- it keeps the kids out of the house. Beginner reloader here and I am unsure about the length of my .223 cases. We are probably talking 2.0100 to 2.005 or so. The case attracted lots of media ... consumer would have paid less for a sandwich had he or she known of the possibility of the bread's being up to 1/4-inch shorter than the advertised length." I've settled on the charge,seating depth and bullet and I'm getting best accuracy ever out of my rifle at 100 yds. Are mine too short to use? I wanted to ask what is an average safe case length. With those dies you are instructed to trim the cases 0.020 inches shorter than Max: "All cases must be sized and trimmed to the same overall length. Re: case length, how often to check? If these are mixed with normal cases that could be a problem since your dies will be set up to correctly crimp one length and not the other. I feel like I'm just repeating code, is there a way to shorten it? In the hornady manual it list trimmed case length and a max case length. Case length 19.15 mm (0.754 in) Overall length 29.69 mm (1.169 in) Case capacity 0.86 cm³ (13 gr H2O) ... Also, longer will not boost up pressure unless the bullets are into the lands. Not too surprising that it does not show up on target at 200 yards though. The minimum length is not as critical as the maximum length. Did you resize the cases prior to measuring? Isort my cases by head stamp and length so that they are all the same . The Sinclair instructions have a warning that says maintain the case length so that it is a minimum of .024" shorter than the chamber length so that comes out to 1.556". like it was said above you might lose some consistency if you are looking for benchrest groups due to the inconsistent neck tension. I want those cases as long as possible since they always seem to be too short for the chamber. Because of this allowance, the Manufacturer’s Initial Length will sometimes be slightly shorter than SAAMI minimum length. However, it can be as short as 8 days and as long as 16 days. So i have about 100 PPU branded .308 casings. Anything from 2.005” to 2.015” is safe to use. Normally I don't trim at all but if I do I only square the mouths and set them to an even length without removing much material. Archived.308 case length too short? Close up of long and short case. Because new cases are often slightly smaller in diameter than a fired and resized case, some allowance needs to be given for the initial case stretch that can occur when fired in the chamber. The Lee Precision Cutter and Lock Stud works for most calibers. Too short top; Fabric ( lightweight knit or rayon-y woven fabrics, chiffon. Take a look. I've posted my method on seating elsewhere. I seem to recall a recommended minimum neck length of 1/2 bullet diameter. The minimum case length, by the book, is .744. Something with good drape and flow) Ruler, scissors, and other basic sewing supplies; Step 1: Determine how much length you want to add to the top. The problem I kept having was that the index pin that sets the length kept digging a divot in the base piece. 2. But in 20 pcs there are variations of .010 to.015 . Basically the shortest that will retain the bullet. Hi! Close. Articles on the blog have different lengths, and all of the following examples are good stories. I found quite a few that the cases were .003-.08 shorter than the trim length listed in the book. As the case body and neck expand, the case tries to shorten slightly and the case lip tends to pull back. Published case length … the small amt. If you are just plinking with an AR or you feel that 1MOA groups are acceptable, You aren't going to be in any trouble shooting cases down below the recommended 1.750" trim length. Reply. Cookies help us deliver our Services. I have never heard of any real world absolute minimum case length for any bottlenecked cartridge. Your reloading manual will show you a maximum length and a trim-to length. As the 9mm is a tapered case it will gain a little length on resizing. They have been shot once from the same gun i will be shooting them from after loading. It uses a .300 WSM (Winchester Short Magnum) case shortened and necked down to accept a .243in/6mm diameter bullet, and is a high velocity round based on ballistics design philosophies that are intended to produce a high level of efficiency. At least I won't have to invest in a trimmer anytime soon. I'm loading plinking ammo for now so accuracy is not really a concern. Replies. Whatever your regular luteal phase length is, it tends to be a consistent length … They are always a bit too short. I would think what I would be risking by useing the short cases if it were me.I know you will be safe to throw them away and use the correct length ones.It is my opinion we can't be too careful with reloaded ammo.Cases are cheap compared to an accident.Just my opinion,been loading now for 30 years with no problems! I have some control rounds that I'll also shoot for a group. Great idea and awesome tutorial too! Question, I just used my Sinclair Chamber Length Gage Insert on my Savage 6 BR and got a reading of 1.580". On average, the luteal phase is between 12 and 14 days. I put together a little bench with som lee precision presses and dies, I have everything I need but In my manual I can only seem to find the maximum length for the case. i suppose the load could have impact on case length, hot or mild load. At the same time, frictional forces on the inside of the case from the powder, wad and bullet tries to lengthen the case slightly. you noticed will not affect their performance. I have a switch statement that currently has 10 different cases, however, I need to use it 3 different times (same 10 cases, different results per case), and each case there is only a slight change. The neck of the case must be annealed to the softest condition possible. JMHO Trimming is needed if the case is above its maximum length and is necessary for uniform crimping. So let me start by saying I am new to C#. Where could I find minimum lengths for other calibers? OK where do I go from here? About straight walled revolver cases, all my load manuals show a “trim to case length” which I believe is the case length used in their published load recipes. I had some once fired brass i been collecting, as i went through them and was randoming checking them. Beginner reloader here. Also the casing have not been trimmed or chamfered, only neck sized and deprimed. Visit the SWFA.com site to check out our current specials. I know different case lengths will change bullet seating depth. Probably not a problem if you don't prep a high volume of cases but it's something to watch for over time. I was using my calipers and checking everything. 1.555” is .005” less than Maximum case length for the 6mm BR and is a reasonable accepted standard. Say, .375 H&H? I don't even measure pistol cases that use a taper crimp. Exceeding the maximum length can cause pressure spikes as the case mouth may not be able to expand properly to release the bullet. I'm reloading .308. What is too short too use? I have fired several cases that were trimmed too short. HS. Max is .754. What effect will this have in ballistic performance ? F. Depending on the shortness of your shorts you may want a skinnier bias strip, so if you don’t want to add as much length cut 2.5 inches or 2 inches wide, just remember we’ll be folding these in half so my 3 inch wide strip is going to only be 1.5 inches wide when I attach it to the shorts. I reload 45 Colt, 38 Special and 357 Magnum. Therefore, any gap between the case lip and the transition step may or may not widen. The brass is shorter than the specs in the reloading manual (2.015"). Post by wheelgun7360 » Wed Sep 19, 2012 1:02 am i trim after the first firing and check them after about 5 firings. I would determine the length of the chamber and trim to maximum length. I would just load them to the proper OAL and fire them. I just went ahead and loaded only the cases that were in the GTG margin. The 243 Winchester Super Short Magnum or 243 WSSM is a rifle cartridge introduced in 2003. The cartridge overall length is 72.6 mm, cartridge case is 53.34 mm in length and the bullet diameter is .308 in (7.62 mm), which is common to all U.S. .30 caliber cartridges. I always seem to have a hard time finding shorts that are long enough too. Pre-set case trimmers like Lee trim .005” less than Maximum for bottleneck cartridges. What is too short too use? And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell. I have seen match grade ammo have a case length shorter than trim length. .308 case length too short? Edit: 2.005 inches is the recommended trim length. The Lee Precision Case Length Gauge and Shell Holder combined with the Lee Precision Cutter provides the simplest way to check the length of your cases and trim them to the correct, safe length. A full-length resized case, being slightly So how can a 5.56 NATO case be trimmed to the shorter length of a .223 case when a 5.56 out of the box has a longer case ... sure how many times fired) and a 5.56 that measures 1.756 (fired once). They have been shot once from the same gun i will be shooting them from after loading. For best accuracy it is good to have a consistent case length. Both too short or too long can hurt you. Most cases are up to 9 thou shorter that the trim to length. Thank you for the clarification. The principle at work in the short magnum cartridge is the advantage of fitting larger volumes of powder in closer proximity to the primer's flash hole, resulting in more uniform, consistent ignition. But they are not all the same length. For the best results, full-length resize each case and trim to .020” under maximum case length. Trim your strip to length. on use, as an observation, pistol cases get shorter and rifle get longer. Add Length to Your Shorts So I have green and blue shorts that I bought from Old Navy last summer. And all cases to be too short or too long can hurt you cast, Press J jump... Average safe case length to release the bullet up on target at 200 case length too short though able to expand properly release. A few that the cases were short by the depth of the case tries to shorten slightly and transition! A slight downward drop in velocity that follows the neck being a little length on resizing can to... 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