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 Posted: Sun Feb 12th, 2017 06:33 PM
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j_locke81
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why the hell do they give u a c.o.l. length on a cannelure bullet cause its not the length it says it needs to be if you put it to the cannelure. So my question is what do I do make it the c.o.l. length of go to the cannelure? I have never load cannelure bullets before. :confused::banghead:



 Posted: Sun Feb 12th, 2017 06:59 PM
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Paul Tummers



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Forget about the canelure and load to the C.O.L. For my rifles the are just outside the case mouth.



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 Posted: Sun Feb 12th, 2017 07:06 PM
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j_locke81
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ok. I forgot to say that I'm loading for a AR plat forum



 Posted: Sun Feb 12th, 2017 07:31 PM
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Paul Tummers



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When you have a C.o.l. that does not match with the cannelure just forget the cannelure, but crimp just were you need to do it, just like you would do with a bullet without a cannelure.



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 Posted: Sun Feb 12th, 2017 07:51 PM
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Rockydog



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Is the COL longer or shorter than the length when crimped at the cannelure? You can move the bullet by a fair amount by crimping just under the lip of the top of the cannelure or just over the lip at the bottom.

Are your cases trimmed to minimum trim to length or standard case length? Or not trimmed to uniform length? RD



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 Posted: Sun Feb 12th, 2017 07:58 PM
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j_locke81
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cases are trimmed to the min. case trim length. the bullet will be significantly sorter when I take it to the cannulare.



 Posted: Sun Feb 12th, 2017 08:03 PM
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j_locke81
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ok thanks paul. I was just hoping I could take it to the cannulare cause it would make things easier. also I went and got some of my factor rounds and check the c.o.l on them and those are sort as well but when I would make my rounds up if I take them to the cannulare they would be way sort then the factor rounds what safe and what gives with that



 Posted: Sun Feb 12th, 2017 08:04 PM
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Rockydog



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How much shorter is significantly shorter? Glad to try and help but we need data to do so. Length, brand of bullet, bullet weight, caliber etc. RD



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 Posted: Sun Feb 12th, 2017 08:22 PM
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j_locke81
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ok well factory round with cannulare is 2.147 long
my round load with to the cannulare is 2.093 long is has a hornady .308 cal. bullet that is a 150gr. btsp interlock. I am loading it for a 300 blackout ar platform. the hornady load book gives me a c.o.l of 2.220 for that bullet and weight shown right under the pic of the bullet



 Posted: Sun Feb 12th, 2017 10:03 PM
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RobertMT
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As long as you workup load for shorter COAL and it still functions, you can adjust seating depth to what you choice. Published data, including COAL is a reference to use, not a Commandment. Generally as long as you workup from starting load, you can make reasonable adjustments, seating deeper by .125", is not going to bite you, at starting load level. Just a hint, next time, leave brass longer and you won't have to seat as deep, just trim to do not exceed length.



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 Posted: Sun Feb 12th, 2017 10:29 PM
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GSP4EVER
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FWIW j_locke81 my 300 Blk rounds I loaded with the 150 grain Hornady Interlok were loaded to the length of 2.095 and I used the cannelure for crimping. My brass was new Silver State Armory (SSA) trimmed to the Hornady 9th Edition published "trim to length" of 1.358" All fed/fired out of my AR with out any difficulty. Groupings were real good at 100 yards. I did not measure the group. I killed a Whitetail with this combo this past fall. I was having the dilemma as you are when I first started. I found information about seating to the cannelure vs. published COAL at the 300 blackout forum. The choice is yours and this was my experience. YMMV. I do plan to load another 100 of this combo.



 Posted: Sun Feb 12th, 2017 10:54 PM
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j_locke81
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thanks for the info gsp4ever



 Posted: Mon Feb 13th, 2017 12:06 AM
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Snuffy
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Ahhh! As Rockydog alluded to, the devil is in the details. The cannelure on that bullet would be in just the right spot for the .308 Winchester or the 30-06 Springfield.
Your .300 Blkout is a different animal all together. As stated above, COAL is what you make it, as long as you work up the load.



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 Posted: Mon Feb 13th, 2017 02:12 AM
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Damannoyed
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j_locke81 wrote:
why the hell do they give u a c.o.l. length on a cannelure bullet cause its not the length it says it needs to be if you put it to the cannelure. So my question is what do I do make it the c.o.l. length of go to the cannelure? I have never load cannelure bullets before. :confused::banghead:

If you want to use the cannelure, your OAL is whatever you get.

If you want a different OAL,,, then ignore the cannelure.

Neitehr is "wrong", it's your call what you want to do.



 Posted: Mon Feb 13th, 2017 04:25 AM
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Jammer Six
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j_locke81 wrote:
cases are trimmed to the min. case trim length. the bullet will be significantly sorter when I take it to the cannulare.

Just for clarification, the bullet does not change length.

I suspect you mean the round is significantly shorter.

Accurate communication is the only way we can help you. Different words have different definition because they mean different things.



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 Posted: Mon Feb 13th, 2017 01:37 PM
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Ruffian
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COL is a starting point and remember all are not created equal..too many differences in mfg of guns and makes. The round must function first that is must feed in order to fire. Also must get inside of Magazine to feed if Semi-auto or pump a bolt is a little more forgiving with the OAL..Re-read section on bullet seating.



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 Posted: Wed Feb 15th, 2017 05:51 AM
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dadajack
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For most 300 BLK rounds that are not loaded with a bullet designed for the 300, 2.060" will be a good pave to start. If you have experience with loading slow pistol powders, and know what your gun tolerates pressure-wise, you should be able to define a good relative starting point, and what you expect to be the high end of average pressure for that load. Crimping can become quite an ordeal with the 300, as I found out. Don't mash the crimp so hard you increase pressure above max befor you hit the lands. Remember, even though you are using pistol powder, you have a closed action, with nno bleeding of pressure for a cylinder gap, and will get a full burn at, or beyond, 9 inches of barrel length. Look at avaialable data for your bullet/powder combo, and work up slowly from there.



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 Posted: Wed Feb 15th, 2017 12:26 PM
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Ruffian
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The 300 Whisper in a T/C pistol was quite a round back then when we first started playing with that one..still have the brass and all with the custom made dies, just don't play with that one any longer. Sub-sonic was the game back then.:thumbs::thumbs: Have fun and enjoy your toy.



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 Posted: Mon Mar 20th, 2017 10:46 PM
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DocCoffee
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You can always put your own cannelure on where you need it...

Hope it is not against the rules to suggest Google search for
"Ultimate Cannelure Tool"

Kevin



 Posted: Mon Mar 20th, 2017 11:45 PM
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Rockydog



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DocCoffee wrote:
You can always put your own cannelure on where you need it...

Hope it is not against the rules to suggest Google search for
"Ultimate Cannelure Tool"

Kevin


Kevin, There are very few rules on this site except that we don't allow racism or other disrespectful behaviors. If you wouldn't say it on the front porch with your Granny, the preacher and your 10 year old niece present you shouldn't say it here.

We aren't a particularly anal retentive bunch. Off topic wanderings, misspellings, and links to other sites aren't criticized if they can help a member here and meet the guidelines above. Take care and enjoy the site. RD



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Light hunting rifles; Gravity is permanent, recoil is temporary.Your Choice


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