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This is a discussion on Reloads within the Reloading forums, part of the Firearm Forum category; Hey folks I've got a new Ruger American Predator in 6.5 Creedmoor. I developed some reloads with hornady brass (reloaded 5 times) with 40.5grns of ...


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Old April 8th, 2017, 01:51 PM   #1
 
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Reloads

Hey folks I've got a new Ruger American Predator in 6.5 Creedmoor. I developed some reloads with hornady brass (reloaded 5 times) with 40.5grns of RL17 Nosler 140gr Accubonds. This recipe came from Hornady manual but they are for Hornady 140's. Went to the range to shoot. I looked at the first 5 or 6 cases and didn't notice anything. Kept shooting then I moved out to 200yds and noticed my rounds hit the top of the berm. I looked at my brass and there was 6 or 7 with cracks in the base of the brass. I stopped and went home and pulled a couple of bullets to check the charges and they were good 40.5. Anyone have any ideas? I have shot 60 rounds of factory ammo through it to break it in.

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Old April 8th, 2017, 03:41 PM   #2
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6.5 creedmoor is a a high pressure round, best I remember originally designed to operate at 62, 000 psi according to saami. This will undoubtabley reduce the amount of times it can be reloaded. From what I read when it was first introduced that the factory ammo was blowing the primer first round. So the manufacturers reduced the powder to correct the issue due to the complaints from shooters.
Regarding accuracy I find that 5-6 reloads on the same brass alot of times the neck tension is greatly reduced, effecting accuracy, this is not particulary 6.5 creed but many rifle calibers. Just remember brass is a consumbale item, it does not last forever, and the hotter the round, the less life it has. This also effects barrel life as well, the faster and hotter the round is, the quicker the barrel will be shot out. Just my 2 cents.
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Old April 8th, 2017, 03:56 PM   #3
 
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Thanks Tacky. Yeah I pulled all the bullets and threw away all the old brass. I have more coming next week. It is a tack driver .5 moa. Been testing a new scope I was actually doing a tracking test on it when all of that happened.
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Old April 8th, 2017, 04:49 PM   #4
 
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Is the 40.5 gr RL-17 charge a max or start load? With bottleneck style centerfire rifle cartridges, the necks will work-harden after several resizings. Unless annealed after a few resizings, neck cracking almost always results. Cracks at the head of the case are normally from stretching/thinning brass at the body-to-case head web, and it is a warning of incipient head separation. It could be from overworking the brass from full-length resizing, excessive pressures, excessive headspace, defective brass, or a combination of these.
I only partial-length resize my bolt action brass to minimize excessive working of the case body.

One thing I've found in 30 years of handloading is that what is an acceptable max load in a specific rifle, could be way over-max in your specific rifle, due to chamber, barrel, and headspace differences.
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Old April 8th, 2017, 05:25 PM   #5
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I totally agree with Tacky .... brass giving out after 5 reloads is quite normal for high pressure loads. There are a few things you can do to get an extra round or two out of your brass. First and foremost is to use a neck sizer instead of a full length sizer die. This will help prevent case head separation. Annealing brass every two times fired also helps a lot. Instructions for simple annealing are in an article in the Forum Library .... here's a link: http://rugerforum.net/library/20728-...fle-brass.html

Your load runs right at 50k psi .... well below the SAAMI max of 63k psi.
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Old April 8th, 2017, 05:46 PM   #6
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Quote:
Originally Posted by Dirtrider View Post
Thanks Tacky. Yeah I pulled all the bullets and threw away all the old brass. I have more coming next week. It is a tack driver .5 moa. Been testing a new scope I was actually doing a tracking test on it when all of that happened.
Very good idea, that way you can salvage the bullets, and get rid of the questionable brass. I do not own a 6.5 creed, but do own and load for a shilen barreled 6.5 grendel, it also shoots a 5 shot .557 with the 123 nosler bthp. I do run alot of 308, and 243 rifles. The 308 after the 4th firing get regulated to my plinking ammo only, then normally the loose primer pocket, case dent, or a split neck will make me discard it. I also use the high mileage cases in my hk91 since its chamber is fluted, and idents the brass with flutes. But for accuracy, only the best, with under 4 firings has worked predictably for me. I almost built a 6.5 creed ar recently but after thoroughly researching every aspect of it, looking at brass, pressures and other things I decided against it. I like the round, but I already have rifles capable of he same results, and do not have to gear up for loading another caliber. But its accuracy is impressive. Good luck, and glad I could contribute.

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I totally agree with Tacky .... brass giving out after 5 reloads is quite normal for high pressure loads. There are a few things you can do to get an extra round or two out of your brass. First and foremost is to use a neck sizer instead of a full length sizer die. This will help prevent case head separation. Annealing brass every two times fired also helps a lot. Instructions for simple annealing are in an article in the Forum Library .... here's a link: http://rugerforum.net/library/20728-...fle-brass.html

Your load runs right at 50k psi .... well below the SAAMI max of 63k psi.
Thanks for reiterating I had the specs correctly, see I did learn from listening to you over the years as well. I can say that I always learn something when reading your posts. Oh yeah I figured out my 243 win, developing loads now with a new shilen match 1n8 18" barrel.
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Old April 8th, 2017, 06:53 PM   #7
 
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Thanks for all the help guys. Stay safe and God Bless
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