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Bran spanking new to reloading haven't even loaded my first round yet. Got bullets, brass, etc.... But when looking over my load data sheet realized there is no data for cmj " complete metal jacket" and can't seem to find any info online about them.I did read online that cmj's are electro plated so my ? Is should I load under jacketed data, plated data or lead? | ||
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It would be more helpful if you posted more detailed info on the actual bullet you are using such as brand. I have CMJ bullets that are copper jacketed just like a FMJ or TMJ and others that are plated, just depends on how the manufacturer is using the description. If yours are electroplated I would recommend using the plated or lead data, if they are copper jacketed use them with the FMJ data. NRA Life Member | |||
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Yeah good point they are frontier 180gr rnfp cmj cast bullets | |||
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Does CMJ = FMJ ? I don't think I've ever run across the CMJ terminology. | |||
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TMJ and CMJ can be the same thing. Basically the lead core is totally encompased in a copper jacket including the base of the bullet. If you look at a FMJ usually the base of the bullet will be exposed lead. NRA Life Member | |||
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The Frontiers are plated so I would use either plated or lead data. I have not shot the Frontier but have shot a lot of Rainiers and had good accuracy with them. I usually try to keep them below 1100 fps. Check out: http://web.archive.org/web/200...cs.com/mainframe.htm under the Midway link for old Rainier manual for plated bullets, it may be useful. As always cross reference all loads with another source. NRA Life Member | |||
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Thanks for the info very helpfull. | |||
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You are getting off to a good start by asking rather than blindly marching on. I'd recommend you use the Jacketed Data to begin with. It should be the same as Plated Data, with the differences being attributed to the barrels and components used in the different Testing. Always Develop your Loads from below and ONLY use Load Data from a Powder or Bullet Manufacturers Manual. NEVER use Load info from the internet. Since you are new, it is the best possible time for you to learn about the very best Pressure Indication Methods ever devised, good old, never fail, always reliable CHE & PRE. If you are loading older Low Pressure cartridges like a 38Spl, then you need to avoid CHE. The reason is because that by the time the Case Head Expands, you are already beyond the MAX Pressure of the Cartridge. However, PRE works properly with every Cartridge that has ever been made(except the Daisy Rocket Cartridge), Low and High Pressure, pistol, revolver, rifle and shotgun. It has about a 10-15 Case Learning Curve, but if you can tie your boots, you can learn CHE & PRE. Best of luck to you. | |||
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i believe that the plated bullets are to be kept under 1500 FPS | |||
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Hey Butch, Any idea why? | |||
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You say only load from bullet or powder load data, I was looking at loading from the data sheet that came with my die set from lee pace setter dies what your thoughts on that?and if not a good load data source can you recommend a good book to get with simplified instuctions on reloading data? | |||
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The data that Lee provides with their die sets is just a compilation of data from other sources such as bullet and powder manufacturers. It is safe data to use but I always check atleast 2 different sources as typos do happen. Most, if not all, of the powder manufacturers have load data on their web sites for free. I would recommend purchasing a couple of load manuals, the Lee one is good and has a lot of data that I have not seen in other manuals. NRA Life Member | |||
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Berry's recommends keeping theirs below 1200 fps. Each manufacturer is a little different on their load recomendations, Rainier says use lead bullet data with their bullets while Berry's says to use low to mid jacketed bullet data. You also need to be careful when crimping, plated use a very light crimp to keep from damaging the plating. I usually only crimp with the Lee Factory Crimp Die which minimizes the chance of damage. NRA Life Member | |||
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That is a fine source. Yes indeed. I'd recommend two; one from the company that manufactures the Powder you will be using(it is also available on-line and some are FREE at most Gun Shops) and the other from the people who's Bullets you will be using the most. I'm not familiar with "Frontier" and will defer to the other posters about using mild Loads with their Bullets. I do remember Bartsche(or I think it was him) mentioning something about using mid-level Loads with one of the Berry's Plated Bullets. I was basing my comments on the excellent Remington PLHPs(Power-Lokt Hollow Points) and the Speer Gold Dots which are both Plated Bullets. You can run them wide-open and they love it. Best of luck with your Loads. | |||
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To crimp or not to crimp that's the next ? Along with .40 cal I'll be loading .223 to shoot out of an ar15 and was wondering do I need to use the crimp die or not and what are the pros & cons of doing so? | |||
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Hey Jay, You may have better luck with the 2nd question if you start a new thread for it. For the 40, it Headspaces on the Case Mouth. So you need either a Taper Crimp Die or a Profile Crimp Die. They may not even make a Roll Crimp Die for the various 40cal pistol cartridges. For the semi-auto 223Rem, it depends a lot on the NeckTension of the Cases. You could try some with out Crimping and see if the Bullet moves. Place a Cartridge that you have measured for Overall Cartridge Length in the magazine with another one over it. Fire "once" and put another cartridge in the magazine. Do that 10-15 times. Then remove the Cartridge that was not fired and re-measure it. If the OCL is different, then Crimping would eliminate that movement. You might locate a thread or two about it by using the "Find" function. I seem to remember a good many semi-auto guys mentioning they never Crimp. But, it doesn't hurt to re-ask. Best of luck to you. | |||
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Frontier is a trademark used by Hornady....I strongly recommend you call Hornady to get an answer to your concern 1-800-338-3220 /////////////////////////////////////////////////////////////////////////// "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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The problem is there are far more bullets styles available than there is data. Somethimes you just have to extrapolate. Match the bullet rpofile & wt as closely as possible to another bullet that data is avaialble for. When in doubt, you can always use heavier bullet data for lighter bullets. You can always use lead bullet data for jacketed but NOT vise versa. LIFE IS NOT A SPECTATOR'S SPORT! | |||
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 I've used a lot of Berrey's 30 cal. FN 30-30 plated rifle bullets. These have copper thickness right at .007".That is thick plating but not near as thick or homgenious as a cup jacket. Their much greater used bullets are intended for pistol. As they suggested "keep the rifle bullets at 1800 fps or less." It was found that this was good advise as the accuracy as you go beyond 1850fps really gets shaby and there appears to be more copper residue. Should you want some performance data in different cartridges PM me your E-Mail address. Lyman cast data or Lee cast data would be a good start.  rogerOld age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone.. | |||
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Never use data from the internet? Bullobama! I consult www.ammoguide.com with great frequency. All the loads listed there for subscribers (only ones who can see them-- liability thing) either come from the manufacturers or from members who have developed the load themselves. It's a great site. Lots of visual tools. Just $18 a year. Below is a screenshot of four cartridges compared visually. You can compare up to eight side by side. You can also pull up visual ballistics comparisons in the form of bar graphs. I think there are six or seven visual ballistics comparisons. There is also a ballistics calculator that plots out the flight of a bullet according to the parameters you supply, and it will have all kinds of data for the flight at the increments from bench to target that you supply. You want to shoot 1,000 yards and want data every ten yards? It will plot that out for you in three seconds as both a graph and in a table. Fabulous!  | |||
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