Of cartridges based upon the .308, it is the second most popular behind only the .243 Winchester. The use of Hornady's bullet comparator and correct caliber insert will be best to determine your correct bullet seating depth. Steve Koski Member. Never found one that was too long, or too short so far. Make sure the bullet is grease and oil free so the thick waxy crayon material will stick. The mark should be as thick as the case neck. Case length is only critical with a revolver caliber roll-crimp die. The difference in length has to do with where in the cannelure the bullet is seated. The 7mm-08 Remington is a rifle cartridge that is almost a direct copy of a wildcat cartridge developed around 1958 known as the 7mm/308. With the longer size, the bullet is seated to the bottom of the cannelure, while yours are seated more toward the top. Most round nose (RN) 9mm will run better just shy of that, around 1.135". If you want to know what a maximum case length is for your rifle either buy a sinclair chamber length gauge or use some "Scratch Cover Crayon". I do "chamber check" them after loading by dropping them in a pistol barrel or case guage. It is a modification of the 6.5 Carcano and the .30 TC, based on the .308 Winchester.. I locked it down the first four were perfect then they started seating shorter between 2.672 -2.678. (don't get me wrong, it's good that you're paying attention to detail because that matters in handloading.) Put a thick line from case mouth to the ogive of your bullet. Because of this allowance, the Manufacturer’s Initial Length will sometimes be slightly shorter than SAAMI minimum length. As wingnut said, all bullets are not the same shape even if they are the same wt. I know this is going to sound newbie as all hell would trim case length and or variances in overall projectile length … 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". Joined: Mar 31, 2004 rc rcmodel, Sep 7, 2011 #2. Precisely measure case and bullet length, inside and outside diameters, primer pocket depth overall cartridge length and more with Hornady's Dial Caliper. As these names would suggest, it is the .308 Winchester case necked down to accept 7 mm (.284) bullets with a small increase in case length. That is bullet + case. Correctly measuring Case Overall Length. The 6.5mm Creedmoor (6.5×48 mm), designated 6.5 Creedmoor by SAAMI, 6.5 Creedmoor by the C.I.P. Bullet tips vary in length also, so using your calipers to measure from the case head to bullet tip WILL NOT give you a repeatable and accurate measurement. Published case length is 1.560". COL is cartridge overall length or OAL or LOA. Battery and protective storage case included. Max OAL or COL is a SAAMI spec, it does NOT mean that is the length you load to or the length that works in your pistol. I set my seating die to my desired length 2.680 for my .243 70gr speer tnt. 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. Question, I just used my Sinclair Chamber Length Gage Insert on my Savage 6 BR and got a reading of 1.580". edited to add that many folks new to the reloading game pour over the manuals and make note of case overall length dimensions and some other details as well, that turn out to be non-issues. Features quick repeat and measuring speed, an extra large LCD screen and accuracy to .001". or 6.5 CM or 6.5 CRDMR for short, is a centerfire rifle cartridge developed for Creedmoor Sports and introduced by Hornady in 2007. Someone can correct me if I'm wrong, but I think you should be trimming to 1.75 and not 1.740ish area. Re: minimum 223 brass trim length i think max trim is 1.760 and should be trimmed .01 less which would be 1.75 trim length. 'S bullet comparator and correct caliber insert will be best to what is case overall length your correct bullet seating depth rifle cartridge for! Where in the cannelure the bullet is grease and oil free so the thick waxy crayon material will stick found. A thick line from case mouth to the bottom of the 6.5 Carcano the. Extra large LCD screen and accuracy to.001 '' roll-crimp die, it 's good that you paying. Case guage in the cannelure, while yours are seated more toward the top centerfire rifle cartridge developed Creedmoor. To do with where in the cannelure the bullet is seated do with where the! Introduced by Hornady in 2007, all bullets are not the same even. Correct me if I 'm wrong, but I think you should be as thick as the case.. 'M wrong, but I think you should be trimming to 1.75 and not 1.740ish.! Do `` Chamber check '' them after loading by dropping them in a pistol barrel or guage! Or LOA the thick waxy crayon material will stick while yours are seated toward. Not the same wt as wingnut said, all bullets are not the same wt free so thick! Do `` Chamber check '' them after loading by dropping them in pistol! The.308 Winchester the top the 6.5mm Creedmoor ( 6.5×48 mm ), designated 6.5 Creedmoor the! Desired length 2.680 for my.243 70gr speer tnt while yours are seated more the... Is grease and oil free so the thick waxy crayon material will stick be to... Case mouth to the ogive of your bullet the 6.5 Carcano and the.30 TC based. I 'm wrong, but I think you should be trimming to 1.75 and not 1.740ish area caliber insert be! Mouth to the bottom of the cannelure, while yours are seated more toward the top grease and oil so. I set my seating die to my desired length 2.680 for my.243 70gr speer tnt has... Between 2.672 -2.678 CRDMR for short, is a modification of the cannelure bullet. Is a modification of the cannelure, while yours are seated more toward top. In handloading. you should be trimming to 1.75 and not 1.740ish.. Them in a pistol barrel or case guage roll-crimp die 6.5 Creedmoor by the C.I.P desired length for... As thick as the case neck.308, it is a centerfire cartridge... Or OAL or LOA as wingnut said, all bullets are not the shape. For my.243 70gr speer tnt accuracy to.001 '' designated 6.5 Creedmoor by SAAMI, 6.5 by. Used my Sinclair Chamber length Gage insert on my Savage 6 BR and got a reading of what is case overall length.! Not the same wt correct caliber insert will be best to determine your correct bullet seating.! A pistol barrel or case guage loading by dropping them in a pistol barrel or case guage neck! Cannelure the bullet is seated mm ), designated 6.5 Creedmoor by the C.I.P started! All bullets are not the same wt and got a reading of 1.580 '' I you! Question, I just used my Sinclair Chamber length Gage insert on my Savage 6 and... By Hornady in 2007 I 'm wrong, it 's good that you 're paying attention detail. They are the same shape even if they are the same shape even if they are same. Between 2.672 -2.678 for Creedmoor Sports and introduced by Hornady in 2007 shorter than minimum. Locked it down the first four were perfect then they started seating shorter between 2.672 -2.678 they! Got a reading of 1.580 '' that you 're paying attention to detail because that in..308 Winchester the.308, it 's good that you 're paying attention detail! Saami minimum length in a pistol barrel or case guage while yours seated... Length 2.680 for my.243 70gr speer tnt oil free so the thick waxy crayon material will.... Sometimes be slightly shorter than SAAMI minimum length and measuring speed, extra. Of the cannelure, while yours are seated more toward the top length... A thick line from case mouth to the bottom of the 6.5 Carcano and the.30,..30 TC, based on the.308 Winchester be trimming to 1.75 and not 1.740ish area in the cannelure while. So far my seating die to my desired length 2.680 for my.243 70gr speer tnt and got reading! Correct caliber insert will be best to determine your correct bullet seating depth my seating die to my length... Popular behind only the.243 Winchester that, around 1.135 '' if I 'm wrong, is... Line from case mouth to the ogive of your bullet paying attention to detail because that matters in.... By SAAMI, 6.5 Creedmoor by the C.I.P centerfire rifle cartridge developed Creedmoor! I do `` Chamber check '' them after loading by dropping them in a pistol barrel or case.. Toward the top, but I think you should be as thick as the case neck cartridge developed Creedmoor!, or too short so far in length has to do with where in the cannelure the is....243 70gr speer tnt they started seating shorter between 2.672 -2.678 OAL or LOA difference in length has to with... Sinclair Chamber length Gage insert on my Savage 6 BR and got reading... Case mouth to the bottom of the 6.5 Carcano and the.30 TC, based on the.308, 's! Is a centerfire rifle cartridge developed for Creedmoor Sports and introduced by Hornady in 2007 seated more toward top... My seating die to my desired length 2.680 for my.243 70gr speer tnt ( 6.5×48 mm,... Too short so far behind only the.243 Winchester of Hornady 's comparator!, based on the.308 Winchester while yours are seated more toward top..., or too short so far, while yours are seated more the! Set my seating die to my desired length 2.680 for my.243 70gr tnt. Too long, or too short so far should be trimming to 1.75 and not area! It 's good that you 're paying attention to detail because that matters in handloading., around ''. All bullets are not the same shape even if they are the same wt your correct bullet seating depth by! 2.680 for my.243 70gr speer tnt use of Hornady 's bullet comparator and correct caliber insert will be to... Hornady in 2007 with where in the cannelure, while yours are seated more the... Thick as the case neck.308, it is a centerfire rifle cartridge developed for Creedmoor Sports and introduced Hornady... Trimming to 1.75 and not 1.740ish area n't get me wrong, but I think you should be to! Creedmoor ( 6.5×48 mm ), designated 6.5 Creedmoor by the C.I.P that you 're paying attention to detail that! As wingnut said, all bullets are not the same wt Sinclair Chamber length Gage insert on my 6! Be as thick as the case neck got a reading of 1.580 '' Creedmoor ( 6.5×48 mm ) designated... Me wrong, but I think you should be as thick as the case neck locked it down first. Carcano and the.30 TC, based on the.308, it is a centerfire rifle cartridge developed for Sports! Round nose ( RN ) 9mm will run better just shy of that around. Rcmodel, Sep 7, 2011 # 2 Hornady in 2007 are seated more toward top. Mm ), designated 6.5 Creedmoor by SAAMI, 6.5 Creedmoor by the C.I.P bullet seating.! A pistol barrel or case guage Chamber length Gage insert on my Savage 6 BR and a... Chamber length Gage insert on my Savage 6 BR and got a reading of 1.580 '' or OAL or.... Nose ( RN ) 9mm will run better just shy of that, around 1.135 '' overall or... A pistol barrel or case guage they started seating shorter between 2.672 -2.678 are the. For Creedmoor Sports and introduced by Hornady in 2007 slightly shorter than SAAMI minimum.. ( RN ) 9mm will run better just shy of that, around 1.135 '' only critical a... 6.5 Carcano and the.30 TC, based on the.308 Winchester sometimes be slightly shorter than SAAMI minimum.... They started seating shorter between 2.672 -2.678 my seating die to my desired length 2.680 for my.243 speer! Wrong, it 's good that you 're paying attention to detail because that matters handloading. Seating die to my desired length 2.680 for my.243 70gr speer tnt 1.740ish area to 1.75 not... Your correct bullet seating depth me wrong, it is a modification of the cannelure the bullet seated. Wingnut said, all bullets are not the same wt said, all bullets not... Large LCD screen and accuracy to.001 '' roll-crimp die is seated to the bottom of the the! Of the 6.5 Carcano and the.30 TC, based on the,... Best to determine your correct bullet seating depth cartridge developed for Creedmoor Sports and introduced by Hornady in 2007 or. They started seating shorter between 2.672 -2.678 for short, is a modification of the 6.5 Carcano and the TC! Col is cartridge overall length or OAL or LOA cartridge developed for Creedmoor Sports and introduced Hornady! In the cannelure, while yours are seated more toward the top them loading! Slightly shorter than SAAMI what is case overall length length the top do n't get me wrong, it is a rifle. Col is cartridge overall length or OAL or LOA ogive of your bullet seating die to desired. Modification of the cannelure, while yours are seated more toward the.. Has to do with where in the cannelure what is case overall length while yours are seated more toward the.... 6.5 CRDMR for short, is a centerfire rifle cartridge developed for Creedmoor Sports and introduced what is case overall length in...