Quickload can be very helpful in trying to find near duplicate type loads.
It is not helpful that you provided next to nothing for the details of your actual application.
I grabbed a random bullet, guessed at a 24" barrel and a 1700 fps desired velocity.
The info below indicates that Enforcer and 4100 are not the same. However, either is probably a good choice for using in lieu of 2400. If you can find them, AA#9 or SW Heavy Pistol will come closer to duplicating your 2400 load.
Code:
Cartridge : 6.5 x 55 Swedish
Bullet : .264, 150, LYM LRN GC 266673
Cartridge O.A.L. L6: 3.150 inch = 80.01 mm
Barrel Length : 24.0 inch = 609.6 mm
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Hodgdon HS-6 30.4 15.4 1.00 1700 100.0 29517 3644 1.763
Alliant 2400 32.0 15.6 1.01 1700 100.0 20574 4276 2.038
Accurate TCM 30.5 16.2 1.05 1700 100.0 22328 4068 1.962
Accurate No.9 30.0 16.3 1.06 1700 100.0 21803 4128 1.985
Shooters World Heavy Pistol 29.7 16.3 1.06 1700 100.0 21803 4128 1.985
Ramshot Enforcer 32.1 16.8 1.09 1700 100.0 20711 4291 2.054
Vihtavuori N110 *C 39.0 17.0 1.10 1700 100.0 20226 4364 2.084
Accurate 5744 35.4 17.4 1.13 1700 99.5 17562 5120 2.159
Shooters World Buffalo Rifle 36.2 17.4 1.13 1700 99.5 17562 5120 2.159
Accurate 4100 33.2 17.6 1.14 1700 100.0 19936 4392 2.077
IMR 4227 39.4 18.5 1.20 1700 100.0 17772 4950 2.160
Hodgdon H4227 39.6 18.6 1.20 1700 100.0 17542 4972 2.182