Guest Tiff Posted February 23, 2008 Report Share Posted February 23, 2008 I'm after as much load data as possible for the RUM with the 240 MK's. Most of the manuals/websites only list upto 220 grain bullets:( I'm trying to find out what the most efficient powder would be for a 30" tube. So far it looks like H1000 or Retumbo, but which produces the best velocity and are there more suitable powders? Also I've got some H4831 around so any loads with that and 210 bergers or 240's MK's would be great. Cheers Tiff Link to comment Share on other sites More sharing options...
silentsoulsleave308holes Posted February 23, 2008 Report Share Posted February 23, 2008 I use h1000 in my 300wm with 210vld its previous bbl I used h1000 for 220 match kings h4831sc & rl22 are good for 168 to 190 gr bullets h1000 & rl25 for the heavier bullets its not all about the highest speed your gun will do its more about matching the vel to your twist what twist do you have and I will tell you the speed you need to run them 240's at ?????? Link to comment Share on other sites More sharing options...
Guest Tiff Posted February 23, 2008 Report Share Posted February 23, 2008 what twist do you have and I will tell you the speed you need to run them 240's at ?????? Its a 1-10" so hoping to load around the 3,000 mark with the 240's ......You don't have any load data for the RUM by chance with H1000 or Retumbo and the 240's? Link to comment Share on other sites More sharing options...
6mmBR Posted February 23, 2008 Report Share Posted February 23, 2008 Heres some info with H1000 Cartridge : .300 Rem Ultra Mag Bullet : .308, 240, Sierra HPBT LR MatchK 9245 Cartridge O.A.L. L6: 3.598 inch or 91.39 mm Barrel Length : 30.0 inch or 762.0 mm Powder : Hodgdon H1000 Predicted data by increasing and decreasing the given charge, incremented in steps of 2.0% of nominal charge. CAUTION: Figures exceed maximum and minimum recommended loads ! Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time % % Grains fps ft.lbs psi psi % ms -20.0 76 68.00 2335 2907 30384 9156 97.7 2.044 -18.0 78 69.70 2391 3046 32394 9374 98.4 1.992 -16.0 80 71.40 2445 3187 34555 9574 99.0 1.941 -14.0 82 73.10 2500 3331 36853 9754 99.4 1.891 -12.0 84 74.80 2554 3476 39305 9915 99.8 1.834 -10.0 85 76.50 2608 3624 41920 10054 99.9 1.780 -08.0 87 78.20 2661 3773 44720 10172 100.0 1.728 -06.0 89 79.90 2713 3923 47712 10279 100.0 1.677 -04.0 91 81.60 2765 4074 50913 10383 100.0 1.629 -02.0 93 83.30 2816 4227 54338 10484 100.0 1.582 +00.0 95 85.00 2867 4381 57984 10582 100.0 1.538 ! Near Maximum ! +02.0 97 86.70 2917 4536 61858 10677 100.0 1.494 ! Near Maximum ! +04.0 99 88.40 2967 4693 65992 10769 100.0 1.453 !DANGEROUS LOAD-DO NOT USE! +06.0 101 90.10 3017 4851 70409 10857 100.0 1.413 !DANGEROUS LOAD-DO NOT USE! +08.0 102 91.80 3067 5011 75132 10942 100.0 1.374 !DANGEROUS LOAD-DO NOT USE! +10.0 104 93.50 3116 5174 80187 11023 100.0 1.337 !DANGEROUS LOAD-DO NOT USE! Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge Data for burning rate increased by 10% relative to nominal value: +Ba 95 85.00 2960 4671 69975 10205 100.0 1.429 !DANGEROUS LOAD-DO NOT USE! Data for burning rate decreased by 10% relative to nominal value: -Ba 95 85.00 2723 3952 46566 11039 99.4 1.683 I'll run quick load again with Retumbo and post again. Cheers Dave Link to comment Share on other sites More sharing options...
6mmBR Posted February 23, 2008 Report Share Posted February 23, 2008 Heres the Retumbo Cartridge : .300 Rem Ultra Mag Bullet : .308, 240, Sierra HPBT LR MatchK 9245 Cartridge O.A.L. L6: 3.598 inch or 91.39 mm Barrel Length : 30.0 inch or 762.0 mm Powder : Hodgdon Retumbo Predicted data by increasing and decreasing the given charge, incremented in steps of 2.0% of nominal charge. CAUTION: Figures exceed maximum and minimum recommended loads ! Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time % % Grains fps ft.lbs psi psi % ms -20.0 75 68.00 2369 2990 30410 9124 100.0 2.061 -18.0 77 69.70 2420 3121 32446 9260 100.0 2.010 -16.0 78 71.40 2471 3254 34618 9394 100.0 1.960 -14.0 80 73.10 2521 3387 36937 9525 100.0 1.912 -12.0 82 74.80 2571 3521 39412 9655 100.0 1.856 -10.0 84 76.50 2619 3656 42058 9781 100.0 1.802 -08.0 86 78.20 2668 3793 44867 9906 100.0 1.750 -06.0 88 79.90 2716 3930 47827 10028 100.0 1.701 -04.0 90 81.60 2763 4068 50957 10147 100.0 1.654 -02.0 91 83.30 2810 4208 54274 10264 100.0 1.608 +00.0 93 85.00 2857 4348 57789 10378 100.0 1.565 ! Near Maximum ! +02.0 95 86.70 2903 4490 61515 10490 100.0 1.523 ! Near Maximum ! +04.0 97 88.40 2949 4634 65466 10598 100.0 1.482 !DANGEROUS LOAD-DO NOT USE! +06.0 99 90.10 2995 4779 69658 10704 100.0 1.443 !DANGEROUS LOAD-DO NOT USE! +08.0 101 91.80 3040 4925 74108 10806 100.0 1.406 !DANGEROUS LOAD-DO NOT USE! +10.0 103 93.50 3085 5073 78836 10905 100.0 1.370 !DANGEROUS LOAD-DO NOT USE! Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge Data for burning rate increased by 10% relative to nominal value: +Ba 93 85.00 2937 4597 70198 10073 100.0 1.453 !DANGEROUS LOAD-DO NOT USE! Data for burning rate decreased by 10% relative to nominal value: -Ba 93 85.00 2735 3986 45483 10823 100.0 1.718 Good luck 86.7 grains of H1000 looks good a 97% fill and 100% burn rate for a velocity of 2967. Can't be bad. Dave Link to comment Share on other sites More sharing options...
Vermincinerator Posted February 23, 2008 Report Share Posted February 23, 2008 Tiff, The Sierra manual lists loads for the 300 RUM using the 240 SMK, however it reccomends a twist rate of 1-9 of faster in order to stablilze this bullet. Ian. Link to comment Share on other sites More sharing options...
Guest Tiff Posted February 23, 2008 Report Share Posted February 23, 2008 Tiff,The Sierra manual lists loads for the 300 RUM using the 240 SMK, however it reccomends a twist rate of 1-9 of faster in order to stablilze this bullet. Ian. Thanks for all the help so far.....Would you be able to list those loads since I don't have a manual, or are they available online? The twist shouldn't be an issue since Sierra say over 2,700 fps (ish) the 240 will stabilize fine in a 1-10 Plus a 1-10 shouldn't overstablise the 210's at 3,200+ (I hope). Link to comment Share on other sites More sharing options...
Vermincinerator Posted February 23, 2008 Report Share Posted February 23, 2008 Here you go Tiff: Powder/Velocity 2400 2500 2600 2700 2800 AA-3100 68.3 71.3 74.2 77.2 80.1 RE-22 65.6 68.7 71.7 74.8 77.8 AA-870 84.0 87.4 90.7 94.1 97.4 RE-25 67.3 71.3 75.3 79.3 83.3 Retumbo 72.8 76.2 79.7 83.1 86.5 H870 72.5 77.2 81.9 86.5 91.2 --------------------------------------------------------------------- Energy/FT.LBS 3070 3331 3603 3885 4179 Ian. Link to comment Share on other sites More sharing options...
Vermincinerator Posted February 23, 2008 Report Share Posted February 23, 2008 Sorry about that Tiff, i tabulated the data but it did not come out right Ian. Link to comment Share on other sites More sharing options...
silentsoulsleave308holes Posted February 23, 2008 Report Share Posted February 23, 2008 ok your bbl is a 30 cal one in ten weather a 308, 300wm 300 rum etc its the same tube same as mine in fact 30cal 1 in 10 the opt speed for a 30cal ten twist is 2850 whatever you feed it say 178 gr a-max or 220-240smk yes you can go faster or slower but 1 in 10 30cal loves 2850 do some reading and youll find this the norm what you will gain from the longer bbl you could stay the same vel but drop the charge for less recoil and bbl life my 26" tube needed 78.5gr h1000 for 210vld @2850 my new 32" tube needs 74.5 for the same vel but check your estimated pressure for that much reduction to be safe I done all the math and checked it over with JR, I wanted that vel of 2850 for 210 vld's but be 15thou in the lands to gain a bit of pressure and have the bullet sat ontop 98-99% fill when bullet gets soft seated back when chambered we both run the math and talked about it and he throated for this so my round is basically very near saami length although 15thou in ontop of full case it was a bit of a gamble coz if I had made any mistake in the math it would be a balls up so we agreed and I got her back first load was with h1000 74.5gr 210 vld as predicted, took a big gulp, kissed my ass goodbye and sqeezed that trigger bang, f.... me I am ok, looked at the crono and wanted to give JR a big kiss on the forhead,,,,,vel of 2847 stuck with that load since,,,,no need to change,,,if it aint broke dont fix it,,, Link to comment Share on other sites More sharing options...
Guest Tiff Posted February 24, 2008 Report Share Posted February 24, 2008 Thanks for all the info so far, it looks like the following recipes should work: Retumbo 210gr Berger 94.0gr MAX LOAD 240gr MK 86.5gr MAX LOAD H1000 210gr Berger 92.0gr MAX LOAD 240gr MK 86.5gr MAX LOAD Can anybody see anything wrong with the above loads? I've been meplat pointing a few hundred 240MK's today, so all being well they should have a BC near .730 Just hoping the proof house don't destroy my rifle...... Link to comment Share on other sites More sharing options...
silentsoulsleave308holes Posted February 24, 2008 Report Share Posted February 24, 2008 what speed will the h1000max92gr 210 give???? Link to comment Share on other sites More sharing options...
Guest Tiff Posted February 24, 2008 Report Share Posted February 24, 2008 what speed will the h1000max92gr 210 give???? The 92gr MAX is quite 'stretchy' in some guns....Having said that it's easy in most 30"+ RUM's to get 3,200-3,250fps with the 210's . Link to comment Share on other sites More sharing options...
silentsoulsleave308holes Posted February 26, 2008 Report Share Posted February 26, 2008 to get 3100 210 vld I should be able to run an easy about 78-78.5 gr h1000 in my 32" tube currently using a really low charge of 74.5 h1000 to get them to 2850 a little less hungry than the rum in the 210 department Link to comment Share on other sites More sharing options...
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