Greenbear Posted November 17, 2007 Report Share Posted November 17, 2007 Hi Guys, I shall throw myself at your mercy and request some loading date for my .223, its a stainless heavy barrelled Howa 1500. I have Lapua Brass Sierra Gameking 55g heads H335 CCI benchrest primers Has anybody worked a good load arounf these? Any help would be much appreciated. Many thanks GB Link to comment Share on other sites More sharing options...
6mmBR Posted November 17, 2007 Report Share Posted November 17, 2007 Hi, I have no experience with H335. With 55gn heads I find a charge of around 24.7gns of N133 or 25gns of N135 pretty good. What length barrel have you on the Howa and what OAL are you loading to? If you let me know these things and I;'ll run a simulation with H335 through quick load for you. Cheers Dave Link to comment Share on other sites More sharing options...
6mmBR Posted November 17, 2007 Report Share Posted November 17, 2007 here's a rough guide for you, looks like around 27gns is max at SAAMI length. As always start low and work up. Cartridge : .223 Rem. Bullet : .224, 55, Sierra SP 1360 Cartridge O.A.L. L6: 2.260 inch or 57.40 mm Barrel Length : 24.0 inch or 609.6 mm Powder : Hodgdon H335 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 74 20.00 2514 772 24463 5323 84.1 1.376 -18.0 76 20.50 2576 810 26050 5506 85.5 1.342 -16.0 78 21.00 2638 850 27744 5686 86.9 1.308 -14.0 80 21.50 2700 890 29553 5861 88.3 1.275 -12.0 82 22.00 2762 932 31486 6032 89.5 1.242 -10.0 84 22.50 2824 974 33552 6197 90.8 1.211 -08.0 86 23.00 2887 1018 35762 6356 91.9 1.180 -06.0 87 23.50 2949 1062 38126 6509 93.0 1.148 -04.0 89 24.00 3012 1108 40660 6654 94.0 1.116 -02.0 91 24.50 3074 1154 43375 6791 95.0 1.085 +00.0 93 25.00 3137 1202 46288 6920 95.8 1.054 +02.0 95 25.50 3199 1250 49418 7039 96.6 1.025 +04.0 97 26.00 3261 1299 52783 7149 97.3 0.997 +06.0 99 26.50 3323 1349 56405 7249 98.0 0.970 ! Near Maximum ! +08.0 100 27.00 3385 1399 60308 7337 98.5 0.943 ! Near Maximum ! +10.0 102 27.50 3447 1451 64519 7415 99.0 0.918 !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 25.00 3302 1331 55816 6946 99.5 0.977 ! Near Maximum ! Data for burning rate decreased by 10% relative to nominal value: -Ba 93 25.00 2925 1045 37801 6552 88.3 1.154 Cheers Dave Link to comment Share on other sites More sharing options...
ejg223 Posted November 18, 2007 Report Share Posted November 18, 2007 Hi Guys, I shall throw myself at your mercy and request some loading date for my .223, its a stainless heavy barrelled Howa 1500. I have Lapua Brass Sierra Gameking 55g heads H335 CCI benchrest primers Has anybody worked a good load arounf these? Any help would be much appreciated. Many thanks GB I only tried one load in my 223, 25gr H335 & 52gr a-max, BR4 primer, Sako or fed brass. It shot so well that I never changed. Rifle was a 26" CZ 527 1in 12. edi Link to comment Share on other sites More sharing options...
Redfox Posted November 18, 2007 Report Share Posted November 18, 2007 A friend has outstanding results with 27grs Varget behind 50gr Vmax and Sierra Blitzkings 1/4" groups at 100 yds even before he fitted a T8 on it, now they are possibly even tighter. Redfox Link to comment Share on other sites More sharing options...
Greenbear Posted November 19, 2007 Author Report Share Posted November 19, 2007 Cheers for all the info, forgot to mention my Wildcat mod, never mind plenty to go on. Thanks again GB Link to comment Share on other sites More sharing options...
foxing2night Posted November 21, 2007 Report Share Posted November 21, 2007 Good advice!! 25grains of vit133 or ramshot If you can get it?? Seated just of the lands was my best load when i had my 223, used it for 6 years before i sold it Link to comment Share on other sites More sharing options...
silentsoulsleave308holes Posted November 25, 2007 Report Share Posted November 25, 2007 what twist? so I can calc the opt speed Link to comment Share on other sites More sharing options...
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