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 Load request
 22-250 rem, Sierra 65 GR SBT
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JesperBloch
New Member

Denmark
12 Posts

Posted - Sep 07 2017 :  07:15:49  Show Profile Send JesperBloch a Private Message  Reply with Quote
Hi guys

Does anyone have an idea of a load for a 22-250 rem using Sierra (Game King) 65 GR SBT bullets and Norma 203-B powder.
I cannot seem to find any data anywhere.
COAL 2.350'', barrel length 560 mm, Winchester LR primer, Lapua brass.

Jesper

Zero333
Advanced Member



Canada
810 Posts

Posted - Sep 07 2017 :  09:00:45  Show Profile Send Zero333 a Private Message  Reply with Quote
I can only offer Quickload prediction...
--------------------------------------------

Cartridge : .22-250 Rem. (SAAMI)
Bullet : .224, 65, Sierra SPBT 1395
Useable Case Capaci: 39.628 grain H2O = 2.573 cm≥
Cartridge O.A.L. L6: 2.350 inch = 59.69 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Norma 203B

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 77 28.00 2744 1087 32050 9281 91.3 1.286
-18.0 79 28.70 2810 1140 34142 9560 92.5 1.255
-16.0 80 29.40 2876 1194 36362 9830 93.6 1.225
-14.0 82 30.10 2941 1249 38717 10090 94.6 1.189
-12.0 84 30.80 3007 1305 41215 10338 95.6 1.154
-10.0 86 31.50 3072 1362 43865 10573 96.4 1.121
-08.0 88 32.20 3137 1420 46676 10794 97.2 1.089
-06.0 90 32.90 3202 1479 49659 11001 97.9 1.057
-04.0 92 33.60 3266 1539 52823 11192 98.5 1.028
-02.0 94 34.30 3330 1600 56183 11367 99.0 0.999 ! Near Maximum !
+00.0 96 35.00 3393 1662 59749 11524 99.4 0.971 ! Near Maximum !
+02.0 98 35.70 3456 1724 63541 11664 99.7 0.944 ! Near Maximum !
+04.0 100 36.40 3518 1787 67570 11785 99.9 0.919 !DANGEROUS LOAD-DO NOT USE!
+06.0 102 37.10 3580 1850 71856 11886 100.0 0.894 !DANGEROUS LOAD-DO NOT USE!
+08.0 103 37.80 3641 1914 76418 11968 100.0 0.870 !DANGEROUS LOAD-DO NOT USE!
+10.0 105 38.50 3702 1978 81279 12043 100.0 0.847 !DANGEROUS LOAD-DO NOT USE!
---------------------------------------------------

It shows MAXIMUM 35.7 gr (2.313 grams) makes 3,518 fps and generates 63,541 psi




Treat that trigger like itís your first date, not like youíve been married to it for 20 years.
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JesperBloch
New Member

Denmark
12 Posts

Posted - Sep 07 2017 :  12:09:36  Show Profile Send JesperBloch a Private Message  Reply with Quote
Hi Zero333

Thank you so much...it gives me a very good starting point .-)
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Zero333
Advanced Member



Canada
810 Posts

Posted - Sep 08 2017 :  08:48:23  Show Profile Send Zero333 a Private Message  Reply with Quote
Any time !

Good luck and as always work up the load accordingly, be safe and most importantly... HAVE FUN !


Treat that trigger like itís your first date, not like youíve been married to it for 20 years.

Edited by - Zero333 on Sep 08 2017 08:49:12
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