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5.6X50R Magnun loads (Read 6933 times)

singleshotsam Oldtimer Offline Posts: 594 Location: Silver City NM Joined: Jan 15^th, 2009	5.6X50R Magnun loads Jul 25^th, 2016 at 3:26pm	Print Post
	I have been working on a Cadet martini in 5.6x50R. One of the forum members was kind enough to loan me the reamer and gauges to chamber a Douglas 22 caliber barrel with 1-8 twist and 26 inch length. My plans are to shoot 65-77 grain bullets mostly and was looking for load reference. I have been told to start with 223 Remington or 222 Remington Magnum starting load data and go from there. That sound like reasonable advise but I am curious if anyone out there has data from a loading manual for the true cartridge. I have bushed the breech block and reduced the firing pin tip as well. I have all the components on the bench ready to go but and am anxious to start working up loads. TIA for any assistance. SSS


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40_Rod Frequent Elocutionist Offline Extremism in the persuit of accuracy is not a vice Posts: 4285 Location: Knoxville, TN Joined: Apr 20^th, 2004	Re: 5.6X50R Magnun loads Reply #1 - Jul 26^th, 2016 at 8:31am	Print Post
	5.6 X 50R is the European version or the 222 Rimed. It is a little longer so you should be able to use 222 load data as a start point. 40 Rod


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singleshotsam Oldtimer Offline Posts: 594 Location: Silver City NM Joined: Jan 15^th, 2009	Re: 5.6X50R Magnun loads Reply #2 - Jul 27^th, 2016 at 1:24pm	Print Post
	Thanks Rod, I will use a mild load for the 222 mag to fire form cases and break in the barrel. Once that is done I will search for an accuracy load in the rifle. SSS


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MartiniBelgian Frequent Elocutionist Offline Posts: 1734 Location: Aarschot Joined: Jun 7^th, 2004	Re: 5.6X50R Magnun loads Reply #3 - Jul 28^th, 2016 at 5:56am	Print Post
	As far as I know, the case is a bit bigger than the .222 mag, and the round, performance-wise, would be pretty close to the .225 Win...


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singleshotsam Oldtimer Offline Posts: 594 Location: Silver City NM Joined: Jan 15^th, 2009	Re: 5.6X50R Magnun loads Reply #4 - Jul 28^th, 2016 at 8:02am	Print Post
	MartiniBelgian, Thanks for your input. At this point I will be starting with 222 Magnum medium range loads to break in the barrel. I will be shooting through a chronograph documenting velocities for reference. Once that is done I will start increasing loads watching for any signs of excessive pressure until approaching 222 Magnum maximum loading data. I am not trying for the fastest load, accuracy is my primary goal with heavier (69-77 grain) bullets. SSS


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ireload2 Full Member Offline Posts: 169 Joined: Jul 9^th, 2009	Re: 5.6X50R Magnun loads Reply #5 - Jul 28^th, 2016 at 5:29pm	Print Post
	The Hornady 4th Edition loading manual Volume 1 has loading data for the 5.6X50 Magnum rimless version. It says the rimless version is based on the rimmed version. The heaviest bullets listed are 60 grains Max loads are 3031 - 25.5 grains 4064 - 27.8 grains 748 - 28.7 grains


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Nero Frequent Elocutionist Offline Posts: 1026 Location: NZ Joined: Jun 1^st, 2006	Re: 5.6X50R Magnun loads Reply #6 - Jul 29^th, 2016 at 11:53pm	Print Post
	I use Australian ADI powders which are sold I think under another name in the US, for my small frame BSA Martini in 5.6x50R. My start load was 26.5 grains with AR 2208 and a 55 grain home made open tip bullet with a Corbin Jacket and a big bullet jump to the lands. 1" group first time out and fire forming the cases. Haven't tried anything else yet.
	« Last Edit: Jul 30^th, 2016 at 12:17am by Nero »

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Nero Frequent Elocutionist Offline Posts: 1026 Location: NZ Joined: Jun 1^st, 2006	Re: 5.6X50R Magnun loads Reply #7 - Jul 29^th, 2016 at 11:54pm	Print Post
	Tried to get another attachment on the first post but wouldn't take it. Hope its some use to you. Powder Equivalents. Had this chart given to me and the table shows only approximate values within about 5%
	« Last Edit: Jul 30^th, 2016 at 5:26am by Nero »

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ireload2 Full Member Offline Posts: 169 Joined: Jul 9^th, 2009	Re: 5.6X50R Magnun loads Reply #8 - Jul 31^st, 2016 at 1:21am	Print Post
	Here is a link to the ADI site (You need to *Login* or *Register* to view media files and links)


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uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: 5.6X50R Magnun loads Reply #9 - Jul 31^st, 2016 at 3:15am	Print Post
	Case capacities from Quickload database: .223 or 5.56x45 = 30 grains water .222 Rem Magnum = 30.2 grains water 5.56x50R = 32 grains water 21.0 grains of Varget would be my starting load for a 75 grain bullet, because Varget is what I like for the .223. There's any number of other powders aimed at the .223 / 5.56x45 market that will be good. For those heavy bullets BL-C2 ought to be about right. Ditto H380, CFE223, 4064, even 4895. If you're not averse to spending a couple hundred $$, a copy of Quickload will be invaluable. Much better than fussing about with paper charts that don't cover your heavy bullet choice, don't have a clue what your seating depths will be, and don't know what you think is a safe pressure for that rifle.
	« Last Edit: Jul 31^st, 2016 at 4:17am by uscra112 »
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