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Has anyone tried this combination yet?
My current favorite load with the 6.5x55 and the 129g Hornady SP is with Reloder 22. I don't love the POI and velocity changes with temperature swings with this combination however. I'm wondering what kind of accuracy you may have had with this combo and if you've tested it in widely varying conditions?
If you've tried Reloder 23 in similar cartridges what has it shown with regards to it's temperature resistance?
Thanks for any feedback you may have.
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
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Oh, and I asked Alliant if they had any load data for this combo.
Alliant has no tested data for this Hornady bullet and powder combination.
I will submit your request to the engineering lab for possible future development. But, there is no timetable as to when this may be looked at for development.
Thanks
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
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Campfire Kahuna
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Campfire Kahuna
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Azar,
Tried 23 with 140's in the .260 Remington, and the load acted very similarly at zero F. as it did at 70 degrees. In fact it gained about 30 fps velocity at zero, and POI remained the same at 100 yards.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck
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Excellent! That's good to hear. The 6.5x55 and .260 are close enough that hopefully there will be some correlation between the two with regards to temp. resistance.
Do you have any comparisons velocity-wise when compared against Reloder 22 in the same application?
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
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Campfire Kahuna
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Campfire Kahuna
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Nope, but have used enough 22 in the 6.5x55 to be reasonably sure both powders produce about the same velocity.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck
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Thanks. I really appreciate your feedback.
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
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Hornady's response when requesting any load data they might have: Thank you for your inquiry. Unfortunately I don’t have any data for that chamber, powder, and bullet combination. You may want to try Alliant at 800-379-1732 to see if they have a load for that powder.
So no data from either bullet or powder manufacturer. I did get a data update for QuickLOAD in December, but I don't like relying on it as the only source of load data. For those that have used Reloder 22 & 23, how similar are the charge weights? I believe I've read that 23 tends to run a bit faster than 22. What experiences have you had?
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
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Here is QuickLOAD data for anyone that may care. USE THIS DATA AT YOUR OWN RISK.Cartridge : 6.5 x 55 Swedish
Bullet : .264, 129, Hornady SP 2620
Useable Case Capaci: 53.274 grain H2O = 3.459 cm³
Cartridge O.A.L. L6: 3.055 inch = 77.60 mm
Barrel Length : 23.6 inch = 598.5 mm
Powder : Alliant Reloder-23
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.2% 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
-12.0 92 44.00 2543 1853 35316 10296 98.2 1.461
-10.8 93 44.60 2579 1905 36756 10421 98.6 1.439
-09.6 94 45.20 2614 1958 38256 10539 99.0 1.411
-08.4 95 45.80 2650 2011 39824 10648 99.3 1.385
-07.2 97 46.40 2685 2065 41461 10749 99.5 1.359
-06.0 98 47.00 2720 2119 43170 10841 99.7 1.334
-04.8 99 47.60 2755 2174 44958 10925 99.9 1.309
-03.6 100 48.20 2790 2229 46825 10999 100.0 1.284
-02.4 102 48.80 2824 2285 48777 11063 100.0 1.261 ! Near Maximum !
-01.2 103 49.40 2859 2341 50819 11121 100.0 1.237 ! Near Maximum !
+00.0 104 50.00 2893 2397 52957 11177 100.0 1.215 ! Near Maximum !
+01.2 105 50.60 2927 2453 55194 11232 100.0 1.193 !DANGEROUS LOAD-DO NOT USE!
+02.4 107 51.20 2960 2510 57538 11285 100.0 1.171 !DANGEROUS LOAD-DO NOT USE!
+03.6 108 51.80 2994 2568 59992 11337 100.0 1.149 !DANGEROUS LOAD-DO NOT USE!
+04.8 109 52.40 3028 2625 62561 11388 100.0 1.129 !DANGEROUS LOAD-DO NOT USE!
+06.0 110 53.00 3061 2684 65238 11438 100.0 1.108 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 104 50.00 2960 2510 59241 10932 100.0 1.162 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 104 50.00 2809 2260 47157 11405 99.6 1.275 ! Near Maximum !
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
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Last week I loaded up 10 rounds, 1 charge each from 44.6g to 50.0g in 0.6g increments. The last 3 charges filled the case quite full. In fact, I loaded cases more full than I ever have before. The 48.8 grain charge looked like it was just below the neck, the 49.4g charge was into the neck, and the 50.0g charge was about 1/2 up the neck. I decided to load them anyway.  The rifle in question is a modern actioned CZ 550 American. I tested fired the rounds on Saturday over a Shooting Chrony Beta Master chronograph watching velocities, for signs of brass fatigue, and difficult extraction or hard bolt lift. Here are the results: 44.6g 2,685 fps 45.2g 2,739 fps 45.8g 2,781 fps 46.4g 2,805 fps 47.0g 2,855 fps 47.6g 2,895 fps 48.2g 2,926 fps 48.8g 2,975 fps 49.4g 3,020 fps 50.0g 3,036 fps I thought about stopping at the 47.6g load since the velocity for that load was for the predicted C.I.P. max pressure for the 6.5x55. I decided to keep going as long as bolt lift was okay and brass looked normal since this was a strong, modern Mauser action. All brass extracted easily with no noticeable increase in difficulty of bolt lift. Brass didn't show any obvious signs of gross over pressure. In fact, you couldn't eyeball any difference in brass between the 44.6 and 50.0g loads. Velocities, however, were getting quite high. I started pushing into .270 Winchester territory.  Here is an adjusted QuickLOAD guesstimate where it matches velocity readings decently in the mid-range of charges: USE THIS DATA AT YOUR OWN RISK.Cartridge : 6.5 x 55 Swedish
Bullet : .264, 129, Hornady SP 2620
Useable Case Capaci: 53.405 grain H2O = 3.468 cm³
Cartridge O.A.L. L6: 3.055 inch = 77.60 mm
Barrel Length : 23.6 inch = 598.5 mm
Powder : Alliant Reloder-23 ?
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.2% 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
-12.0 91 44.00 2674 2049 42323 10128 100.0 1.357
-10.8 93 44.60 2708 2100 44116 10199 100.0 1.332
-09.6 94 45.20 2741 2152 45975 10268 100.0 1.307
-08.4 95 45.80 2774 2204 47901 10336 100.0 1.283 ! Near Maximum !
-07.2 96 46.40 2807 2256 49899 10403 100.0 1.260 ! Near Maximum !
-06.0 98 47.00 2839 2309 51977 10469 100.0 1.237 ! Near Maximum !
-04.8 99 47.60 2871 2362 54141 10534 100.0 1.215 ! Near Maximum !
-03.6 100 48.20 2904 2415 56393 10598 100.0 1.193 !DANGEROUS LOAD-DO NOT USE!
-02.4 101 48.80 2936 2469 58737 10661 100.0 1.171 !DANGEROUS LOAD-DO NOT USE!
-01.2 103 49.40 2967 2522 61178 10722 100.0 1.151 !DANGEROUS LOAD-DO NOT USE!
+00.0 104 50.00 2999 2577 63722 10782 100.0 1.130 !DANGEROUS LOAD-DO NOT USE!
+01.2 105 50.60 3031 2631 66371 10841 100.0 1.110 !DANGEROUS LOAD-DO NOT USE!
+02.4 106 51.20 3062 2686 69133 10899 100.0 1.091 !DANGEROUS LOAD-DO NOT USE!
+03.6 108 51.80 3094 2741 72014 10955 100.0 1.072 !DANGEROUS LOAD-DO NOT USE!
+04.8 109 52.40 3125 2797 75018 11010 100.0 1.054 !DANGEROUS LOAD-DO NOT USE!
+06.0 110 53.00 3156 2853 78153 11063 100.0 1.035 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 104 50.00 3050 2665 70599 10590 100.0 1.087 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 104 50.00 2936 2469 56879 11015 100.0 1.182 !DANGEROUS LOAD-DO NOT USE! QuickLOAD's updated guesstimate puts me in the 66k+ range for the 50.0 load. Estimated to be over pressure by either SAAMI or C.I.P standards by a fair bit and pushing beyond reasonable limits of a modern actioned firearm. At least, if QuickLOADs calculated pressure is to be believed. In any case I now feel like I have a better idea of what this powder will do with a 129/130g bullet in the 6.5x55.
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
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Very interesting data for R23!
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That's great stuff. Haven't used any 23 yet, but I may give it a shot..
Semper Fi
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