I am having a hard time finding any reloading data for a 255grn rnfp bootlit in win38-55 -Henry rifle- using IMR4227. I called Hodgdon and they could not provide any information.
thanks
I am having a hard time finding any reloading data for a 255grn rnfp bootlit in win38-55 -Henry rifle- using IMR4227. I called Hodgdon and they could not provide any information.
thanks
In what caliber? For which rifle or revolver?
4227 is too slow burning to work well in .45 Colt.
Lyman has 4227 data for .454 Casull.
My manuals show IMR 4227 in 45 Colt, but for jacketed only.
Henry rifle 38-55win .
This is not load data, but should give you some idea of what to expect if you are inclined to work up your own load.
I adjusted a RCBS 250 FN to weigh 255, and picked an AOL for a 0.625" seating depth.
Code:Cartridge : .38-55 Win.
Bullet : .375, 250, RCBS FN GC 37-250-FN
Barrel Length : 20.0 inch = 508.0 mm
Powder : IMR 4227
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
-15.9 64 18.50 1350 1032 15729 2414 85.8 1.922
-13.6 66 19.00 1383 1083 16732 2501 87.0 1.868
-11.4 68 19.50 1416 1135 17787 2586 88.2 1.816
-09.1 69 20.00 1448 1188 18896 2670 89.3 1.766
-06.8 71 20.50 1481 1241 20050 2752 90.3 1.719
-04.5 73 21.00 1513 1296 21287 2833 91.3 1.674
-02.3 75 21.50 1545 1352 22574 2911 92.3 1.631
+00.0 76 22.00 1577 1408 23926 2988 93.1 1.590
+02.3 78 22.50 1609 1466 25349 3062 94.0 1.550
+04.5 80 23.00 1640 1524 26844 3134 94.7 1.512
+06.8 82 23.50 1672 1583 28415 3204 95.5 1.476
+09.1 83 24.00 1703 1642 30066 3271 96.1 1.441 ! Near Maximum !
I will start with 18.5grn and go from there. Where did you get this information? thanks
It is a Quickload prediction. Predictions do not always match up well with actual published pressure test results.Quote:
Originally Posted by Larry7293
However, if you have a chrono, and your loads match up with predicted velocities, then the pressure prediction info is probably pretty reasonable.
Larry, Ken Waters tome "Pet Loads" complete volume, lists 18 grains with Lyman bullet 375248, approximately 249 grains. He used Remington 9 1/2 primers, velocity 1340 fps. This load is for weaker action rifles, all Ballards, Stevens 44's & Tip Ups, Colt Lightning and Marlin 1881 Repeater.
This was the only data with that powder for the 3 action strengths that he provides data for. Page 451 if you can lay your hands on the book.
I looked in my old Lyman manual from around 1950 and it shows 17.0 grs of 4227 @1375 for boolet 375248 (250 grains) and 18.0 grains of 4227 for #375296 (265 grains). Tom
thanks