The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Guns, Politics, Gunsmithing & Reloading Reloading Which primer for 7mm rem mag loads?Go | New | Find | Notify | Tools | Reply | |
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Should I use a magnum primer for reloading 7mm? Or could I use cci Benchrest 200, The powder I will be using is rl22 or imr7828 with 140 grain and 160 grain bullets primarily. Or any other sugestions on what has worked well for you guys? I have been using cci br2 for my .280 with great results, so I am just wondering if I should change to a magnum primer? Thanks Elmer | ||
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I use a standard Fed 210M with IMR 4350 and 4831 in my 7 mag. However, if I were going to use a slower powder like 7828 I believe I would use a magnum primer. Just my opinion. | |||
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I'd use a magnum primer, and that primer would be Federal's 215. | |||
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I use Federal 210M primers in my 7mm Rem. Mag. | |||
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Whatever the loading manual recommends. However.....in my world a magnum primer is a magnum primer and a LR primer is a LR primer regardless of the manufacturer. This is not the case with shotshell primers however.....only rifle primers. /////////////////////////////////////////////////////////////////////////// "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery." Winston Churchill | |||
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I use large rifle primers in all of my rifle reloading ( except 223s of course).... Even my 300 Win Mag, which I use loads of 83 grains of H 1000, I still ignite with a large rifle primer ( from each of the majors, CCI, Federal, Rem, and Winchester)... they all work just fine, and I am getting pretty high velocity... like 2950+ fps out of a 220 grain 30 caliber slug in a 300 Win Mag with a 26 inch barrel... Accuracy is pretty impressive also! NO worries here... | |||
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Work up loads trying both & go w/ the one that proves most accurate. For me, 65gr+ of slow powder is where I start looking at a mag primer. BTW, 7828 has proven a great powder for use in the several slightly overbore ronds like the 7rm & 7mmDakota as well as my .280 & .260ai, especially w/ heavier bullets like the 160gr. LIFE IS NOT A SPECTATOR'S SPORT! | |||
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Why do you think they make Mag primers for? For mag rifle cartridges. The other primers state on the box Standard primers as well. If there was no need for mag primers,they wouldn,t make them. vangunsmith | |||
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I wouldn't be afraid to use a Win or Fed std primer, but the CCI std is really weak. | |||
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Hey Elmer, I've always used some kind of Magnum Primer in my various Magnums. Never even considered using a Standard Primer in one, so I can't comment on their performance. I typically use either a Fed-215 or a Rem 9 1/2M. They have always been able to get fine accuracy, and a positive ignition. I don't Hunt in the cold weather that some of the folks on here do, but I've Hunted when it was above 120deg on many occasions. Never had a Primer issue of any sort. Good Hunting and clean 1-shot Kills. | |||
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Guess that applies to the .222 Mag or .223 WSSM? I think not. Never had a problem using standard WLR primers with a 375 H&H or 300 Winchester Mag. Surely some of the really large capacity cases merit a magnum primer, but the only problem I've ever had was using standard large pistol primers in a .44 Mag with a healthy dose of H110. "The best argument against democracy is a five minute conversation with the average voter" - Winston Churchill | |||
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Well, it's not that simple is it. Like Zup siad, the word magnum on the cart. doesn't really mean that much. It's more about the speed & volumn of the powder. My .404jeffery doesn't say magnum on it but it does use 85gr of med./slow powder. I can cram 61gr of H4350 in my 338-06, it doesn't need a mag. primer. I have not see a reason to use them in my 7RM using 64gr of RL22 either. My groups were better w/ F210M than F215M. Your mileage may vary. LIFE IS NOT A SPECTATOR'S SPORT! | |||
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I have 3 7RMs and use Federal Gold Medal 215s in all of them. I experimented with CCI and WLRMs and groups doubled in size. Only cart I've really seen a big difference by switching primers but, I'm sure it can happen in all of them depending on the loads and the rifle. I'd suggest you get the 215s. Good Luck Reloader | |||
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A question for Elmerdeer; Hunting or target practice ?. Large capacity cases slow powder warrant MAGNUM Primers where called for !. It's a hotter mixture which burns longer to insure proper ignition as well as pressure curve for that powder . If I'd had a camera in my possession at a point in time 35 years ago !.I would have taken a picture of a very nice Smith & Wesson 44 that a friend decided to load his own variation of Powder primer combination !. Needless to say it was a VERY BAD IDEA !. Blew up the cylinder dam near took his arm off to boot !. There is a very simple rule which to follow when Re -loading , PRESSURE PRESSURE FAILURE !!!. In other words re loading manuals were not some knot heads get rich quick scheme , they were very carefully and painstakingly tried and tested . So the LOT of us would have a measure of safety while pursuing top performance !. Varying charges of powders is OK varying primers is Ok provided that a re loading manual has it listed some where . I don't recommend mixing the two unless You have a test barrel safety shields and a pressure sensor. Also being qualified to do so surely helps !. Personally I value what time I have left on Planet Earth as well as some of my weapons more than curiosity at this point !!!!!!!.  | |||
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Somewhere in the very dim past is my memory of reading where the Federal 215 was developed specifically for igniting IMR 7828. And FWIW, I believe Accurate Arms recommends magnum primers with their AA8700 only. If I am dreaming, somebody wake me up... I have been wrong before. | |||
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IIRC the Federal 215 primer was developed specifically for Weatherby's 300 magnum. | |||
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Hunting primarily,also a bit of target practice. Will there be a difference of pressure if you change from a standard large rifle primer to a magnum primer if using the same powder charge? For instance 68gr of rl22 and a 140gr accbond? Thanks Elmer | |||
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Ditto. Ted Kennedy's car has killed more people than my guns | |||
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What fredf338 said:
Ditto NRA Endowment Life Member | |||
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YES : Whether or not it a dangerous pressure increase or decrease I can't say !. Magnum primers were originally designed for ignition on large capacity cases , with slow burning powders !. They are designed to Burn the Powder as completely as possible . A 140 grain Accubond with 68.0 grains of Rl22 seems reasonable !. With a standard large rifle primer would be safe !. Provided the fire arm is modern and very good condition !. I concur with the Doubless IMR 7828 Accurate MR-8700 Hodgons , H870 , H4831 and H450 should use a magnum primer !. It's always best to consult a re loading manual to be absolutely sure !. Then check your expended rounds for signs of excessive pressure primer blow outs or flat primers ,case separation !. I simply feel that with so many " Good " loading manuals now available use them !. I have found few if any of my calibers prefer the max load for either accuracy or stopping power . When you slam an Animal say as an Elk with a 175 grain grand slam or ? going near 3K FPS does it really matter if it's only going 2750 FPS ?. Not in my experience they never know what hits them ! They drop right in their tracks . Provided one places the projectile correctly that is !!...  | |||
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I had several dalayed ignitions, few weeks ago, with CCI LR Benchrest; cartridges were 300 WM and 270 WSM. IMO they are too weak for large cartridges, especially with low temperatures. Now I use Fed 215. | |||
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If one uses mag. primers they can cut down there load in powder weight by 10% and still achieve desired results,and save powder,thus get more loads out of a pound. I prefer mag primers in everything as i want a good ignition system to get the maxium results with what i am using in powders. This also is better,when one has a cartridge that has less powder,to keep the possiblity of flash burning. Theare are pros and cons for sure,if it works for you use it then. | |||
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I'm not sure how you came to a 10% factor but my own tests using a chronograph say not true in most cases. Some std. primers are as "hot" as some magnum primers. If you are using mag. primers in everything, you are likely not getting the most accurate loade available. My own tests using a very accurate .260ai, shows match primers giving the best acuracy w/ several powder/bullet combos. I then tested the same loads using Fed215, RP 9 1/2m & CCI mag. primers. The match primer loads were the most accurate & in several case still the fastest. Your cart./rifle may vary but it's not an across the board statement.  LIFE IS NOT A SPECTATOR'S SPORT! | |||
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Yes, you should use a magnum primer for a 7mmRemMag. Magnum primers were designed to give more consistent ignition in magnum cartridges that use large quantities of slow burning powders. You will find that non magnum primers will work, but over the long haul, not as consistently. | |||
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