The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Double Rifles Gospel according to Roscoe!Go | New | Find | Notify | Tools | Reply | |
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I got out to the range today to test the .416 Rigby Kimber and my Chapuis .470. On my last post, Roscoe told me to use a chronograph. This time I did as I was increasing my loads over the start loads for the .470 and working up some loads with the new Nosler FN Solid for the .416. Well, Good thing I did. Really surprised at some of the results. In the .416: Norma Brass, Federal 215 magnun primer, Hornady old stock .416 Rigby RN Soft with 91.0grs of IMR 4831 @ 2306 fps. Hornady old stock steel jacket solid with 91.0grs of IMR 4831 @ 2315 fps. 98.0grs of H4831 and Swift A-Frame @ 2375 ave. High 2386/Low 2364. 99.0 grs of H4831 @ 2394. High 2406/Low 2358. Both loads shot really well and will likely use the 98.0gr load in the Omay this November due to the high temps. (Swift manual lists 99.5grs for 2403 fps as max). Load data from the Nosler site shows start at 95.0/ max at 99.0grs of H4831SC for 2462fps max. Well, I was stupid. I used H4831 and based on data from the Barnes manual(old RN Solid and H4831, 99.0 to 104grs for 2505) I started at 96.0grs. Three shots over the chrono: 2554,2755,2624! Will be pulling these and the loads with 97grs, (did not shoot those!) Surprised at the velocities on these! On to the 470. Jamison brass, Win magnum primer, Hornady DGX Soft. Reloader 15 with the Kynoch foam wad and 88.0grs regulated perfectly, rights and lefts on the center line about 1 inch vertical spread at 50 meters. Three shot chronographed at 2101,2130,2110 fps Shot the rest off the sticks. Two rounds chronographed with 89.0grs went 2160 and 2172fps. They also shot to regulation. I'll have to start again as this was the last of my old lot RL 15 and I'm starting a new lot. Now for a surprise! Most of the posters seem to be using 106 to 108grs of IMR 4831. Well either my lot of IMR 4831 is much hotter or Federal 215's are not the hottest primers out there! 104.0grs with the Win primers went 2300fps!!Will be pulling the rest of these test loads. Seems like many are using 108 to 110grs of H4831. 106.0grs of H4831 went 2174,2181 and 2177fps from the twenty three and a half inch barrel on the Chapuis. They also regulated at 50 meters. Well, I can believe this? But, 2300fps with IMR 4831!!! Won't be messing with this anymore! Unfired Hornady factory are .569 at the base. New Jamison cases are .5685. Once fired Jamison using a Redding die set run.569. Fired Jamisen with 88.0grs of RL 15 are .569 89.0grs also .569. The IMR 4831 run .569 and H4831 are also .569, All primers look normal, rounded with no flattening and the firing pin hits are fine. I learned something today. Thanks Roscoe! I've seen the light and am singing out loud and strong. Now, I've got some bullets to pull! | ||
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RL-15 and foam plug or Dacron filler gets the job done, again! Good report! Rusty We Band of Brothers! DRSS, NRA & SCI Life Member "I am rejoiced at my fate. Do not be uneasy about me, for I am with my friends." ----- David Crockett in his last letter (to his children), January 9th, 1836 "I will never forsake Texas and her cause. I am her son." ----- Jose Antonio Navarro, from Mexican Prison in 1841 "for I have sworn upon the altar of god eternal hostility against every form of tyranny over the mind of man." Thomas Jefferson Declaration of Arbroath April 6, 1320-“. . .It is not for glory, nor riches, nor honours that we are fighting, but for freedom - for that alone, which no honest man gives up but with life itself.” | |||
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375ej: I have always been curious about the IMR 4831 data that I have. My old Hodgdon manual suggests a starting load of IMR 4831 of 105 grains and and a top load of 111 grains with a 500 grain bullet! If you use the old conversion formula for IMR 4831 from cordite (75 X 1.333) you get 99.9 grains. If I was using IMR 4831 in the .470, that's where I would start. Dave DRSS Chapuis 9.3X74 Chapuis "Jungle" .375 FL Krieghoff 500/.416 NE Krieghoff 500 NE "Git as close as y can laddie an then git ten yards closer" "If the biggest, baddest animals on the planet are on the menu, and you'd rather pay a taxidermist than a mortician, consider the 500 NE as the last word in life insurance." Hornady Handbook of Cartridge Reloading (8th Edition). | |||
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Wish I could claim this as being my idea...however It was beat into my head by many who know a lot more than I ever will. I always used a Chronograph with my bolt trash when working up loads. Most of the time it was because I was loading for wildcats and I had to know what was going on with velocity as I increased powder. with doubles I never understood the importance of a chrongraph until I started hanging around the Brother-hood. I still learn a lot and often call on other members when I have problems. Great group of folks here that can teach you a lot if you bother to listen to them. Sounds like you are coming along great with your guns. Welcome to the club! Roscoe ****************************************************************** R. Lee Ermey: "The deadliest weapon in the world is a Marine and his rifle." ****************************************************************** We're going to be "gifted" with a health care plan we are forced to purchase and fined if we don't, Which purportedly covers at least ten million more people, without adding a single new doctor, but provides for 16,000 new IRS agents, written by a committee whose chairman says he doesn't understand it, passed by a Congress that didn't read it but exempted themselves from it, and signed by a President, with funding administered by a treasury chief who didn't pay his taxes, for which we'll be taxed for four years before any benefits take effect, by a government which has already bankrupted Social Security and Medicare, all to be overseen by a surgeon general who is obese, and financed by a country that's broke!!!!! 'What the hell could possibly go wrong?' | |||
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Man that is one LOOOOOOOOG sentence!  ....Mac >>>===(x)===> MacD37, ...and DUGABOY1 DRSS Charter member "If I die today, I've had a life well spent, for I've been to see the Elephant, and smelled the smoke of Africa!"~ME 1982 Hands of Old Elmer Keith  | |||
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Well, after I posted it, I had to take my glasses off to read it! I am a computer luddite!!! | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Double Rifles Gospel according to Roscoe!
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