IMR HANDGUN DATA

TRAIL BOSS

NEVER Exceed the Loads Listed Here

STARTING LOADS MAXIMUM LOADS
POWDER GRS. VEL. PRESSURE GRS. VEL. PRESSURE
 
32 S&W LONG
Case: Remington
Twist: 1:18.75"
Barrel: 5.32"
Trim: .915"
Primer: CCI 500
Bullet: 90 GR. HDY LSWC
Dia. .314"
COL: 1.185"
Trail Boss
1.5
599
5,900 CUP
2.0
730
8,100 CUP
             
32 H&R MAGNUM
Case: Federal
Twist: 1:16"
Barrel: 5"
Trim: 1.070"
Primer: Federal 100
Bullet: 90 GR. HDY LSWC
Dia. .314"
COL: 1.350"
Trail Boss
2.4
751
10,700 CUP
2.8
785
11,300 CUP
             
32-20 WINCHESTER
Case: Remington
Twist: 1:20"
Barrel: 5.5"
Trim: 1.305"
Primer: Winchester SP
Bullet: 90 GR. LRNFP
Dia. .314"
COL: 1.490"
Trail Boss
2.5
785
11,400 CUP
2.8
830
13,900 CUP
Bullet: 115 GR. LRNFP
Dia. .314"
COL: 1.580"
Trail Boss
2.2
642
11,300 CUP
2.5
707
15,300 CUP
             
38 SHORT COLT
Case: Starline
Twist: 1:16"
Barrel: 7.5"
Trim: .755"
Primer: Federal 100M
Bullet: 93 GR. AA206 LRN
Dia. .359"
COL: 1.005"
Trail Boss
1.7
575
2.0
674
Bullet: 135 GR. AA202 LFP
Dia. .358"
COL: 1.135"
Trail Boss
1.5
490
1.7
526
             
38 LONG COLT
Case: Starline
Twist: 1:16"
Barrel: 7.5"
Trim: 1.012"
Primer: Federal 100M
Bullet: 125 GR. LRN
Dia. .358"
COL: 1.400"
Trail Boss
2.0
622
2.4
705
Bullet: 150 GR. LRNFP
Dia. .358"
COL: 1.390"
Trail Boss
1.8
541
2.0
575
             
38 SPECIAL
Case: Winchester
Twist: 1:18.75"
Barrel: 7.7"
Trim: 1.145"
Primer: Winchester SP
Bullet: 125 GR. LRNFP
Dia. .358"
COL: 1.445"
Trail Boss
3.0
753
11,600 CUP
5.3
952
13,400 CUP
Bullet: 158 GR. LSWC
Dia. .357"
COL: 1.455"
Trail Boss
2.7
661
11,400 PSI
4.2
804
13,700 CUP
             
357 MAGNUM
Case: Winchester
Twist: 1:18.75"
Barrel: 10"
Trim: 1.285"
Primer: Winchester SPM
Bullet: 125 GR. LRNFP
Dia. .358"
COL: 1.580"
Trail Boss
3.5
874
14,900 CUP
5.3
1035
17,900 CUP
Bullet: 158 GR. LRNFP
Dia. .358"
 COL: 1.610"
Trail Boss
3.2
754
16,500 CUP
4.2
865
20,400 CUP
             
38-40 WINCHESTER
Case: Winchester
Twist: 1:36"
Barrel: 5.5"
Trim: 1.295"
Primer: Winchester LP
Bullet: 180 GR. LRNFP
Dia. .401"
COL: 1.600"
Trail Boss
4.5
694
7,300 PSI
5.5
800
9,900 PSI
             
41 REM MAG
Case: Remington
Twist: 1:18.75"
Barrel: 10.125"
Trim: 1.280"
Primer: Winchester LP
Bullet: 215 GR. CAST LFP
Dia. .410"
COL: 1.600"
Trail Boss
4.5
752
13,000 CUP
6.5
910
17,100 CUP
Bullet: 245 GR. CAST LSWC
Dia. .410"
COL: 1.630"
Trail Boss
3.5
683
12,600 CUP
6.0
834
16,100 CUP
Bullet: 250 GR. WFNGC
Dia. .410"
COL: 1.540"
Trail Boss
3.7
611
14,600 CUP
5.0
748
20,300 CUP
             
44 RUSSIAN
Case: Starline
Twist: 1:20"
Barrel: 8"
Trim: .960"
Primer: Winchester LP
Bullet: 165 GR. LRNFP
Dia. .430"
COL: 1.165"
Trail Boss
3.3
742
7,600 CUP
4.5
878
11,600 CUP
Bullet: 200 GR. LRNFP
Dia. .430"
COL: 1.245"
Trail Boss
3.0
647
7,900 CUP
3.9
747
10,400 CUP
Bullet: 240 GR. LRNFP
Dia. .430"
COL: 1.275"
Trail Boss
3.0
604
8,800 CUP
3.5
661
10,000 CUP
             
44 COLT
Case: Starline
Twist: 1:20"
Barrel: 8"
Trim: 1.09"
Primer: Federal 150M
Bullet: 165 GR. LRNFP
Dia. .430"
COL: 1.310"
Trail Boss
3.3
698
5,400 CUP
4.5
844
9,700 CUP
Bullet: 185 GR. LRNFP
Dia. .430"
COL: 1.350"
Trail Boss
3.2
643
5,600 CUP
4.0
751
9,600 CUP
Bullet: 200 GR. LRNFP
Dia. .430"
COL: 1.370"
Trail Boss
3.0
595
4,800 CUP
3.9
711
9,300 CUP
Bullet: 240 GR. LRNFP
Dia. .430"
COL: 1.380"
Trail Boss
3.0
563
6,800 CUP
3.4
625
9,000 CUP
             
44-40 WINCHESTER
Case: Winchester
Twist: 1:36"
Barrel: 5.5"
Trim: 1.295"
Primer: Winchester LP
Bullet: 200 GR. LRNFP
Dia. .430"
COL: 1.600"
Trail Boss
5.5
723
7,800 PSI
6.5
826
11,900 PSI
             
44 SPECIAL
Case: Starline
Twist: 1:20"
Barrel: 8"
Trim: 1.55"
Primer: Winchester LP
Bullet: 165 GR. LRNFP
Dia. .430"
COL: 1.365"
Trail Boss
4.8
865
10,700 CUP
7.0
1005
12,100 CUP
Bullet: 185 GR. LRNFP
Dia. .430"
COL: 1.400"
Trail Boss
4.5
791
10,400 CUP
6.6
944
12,600 CUP
Bullet: 200 GR. LRNFP
Dia. .430"
COL: 1.450"
Trail Boss
4.3
757
8,700 PSI
6.3
885
13,200 CUP
Bullet: 240 GR. LSWC
Dia. .430"
COL: 1.450"
Trail Boss
4.0
673
9,700 CUP
5.2
763
11,700 CUP
             
44 MAGNUM
Case: Winchester
Twist: 1:20"
Barrel: 8.275"
Trim: 1.280"
Primer: Remington 2 1/2
Bullet: 165 GR. LRNFP
Dia. .430"
COL: 1.500"
Trail Boss
6.0
960
17,200 PSI
8.0
1086
18,800 PSI
Bullet: 185 GR. LRNFP
Dia. .430"
COL: 1.540"
Trail Boss
6.2
936
19,500 PSI
7.8
1050
21,100 PSI
Bullet: 200 GR. LRNFP
Dia. .430"
COL: 1.570"
Trail Boss
6.1
890
17,900 PSI
7.7
988
20,700 PSI
Bullet: 240 GR. LWSC
Dia. .430"
COL: 1.620"
Trail Boss
6.0
828
19,100 PSI
7.3
917
21,600 PSI
             
45 S&W (SCHOFIELD) (PISTOL)
Case: Starline
Twist: 1:16"
Barrel: 5"
Trim: 1.095"
Primer: Winchester LP
Bullet: 200 GR. LRNFP
Dia. .452"
COL: 1.430"
Trail Boss
4.0
684
9,000 CUP
5.0
791
13,200 CUP
Bullet: 230 GR. HDY LRNFP
Dia. .452"
COL: 1.430"
Trail Boss
4.0
649
9,000 CUP
5.0
739
13,000 CUP
Bullet: 250 GR. LRNFP
Dia. .452"
COL: 1.430"
Trail Boss
3.5
537
7,300 CUP
4.8
685
13,200 CUP
             
45 COLT
Case: Winchester
Twist: 1:16"
Barrel: 7.25"
Trim: 1.280"
Primer: Winchester LP
Bullet: 160 GR. Cast LRNFP
Dia. .452"
COL: 1.480"
Trail Boss
7.0
903
8,100 PSI
8.5
1018
10,800 PSI
Bullet: 180 GR. Cast LRNFP
Dia. .452"
COL: 1.540"
Trail Boss
6.0
818
9,400 PSI
7.3
935
12,700 PSI
Bullet: 200 GR. Cast LRNFP
Dia. .452"
COL: 1.600"
Trail Boss
5.5
706
8,000 PSI
6.5
855
11,000 PSI
Bullet: 215 GR. Cast LRNFP
Dia. .452"
COL: 1.650"
Trail Boss
5.5
725
8,100 PSI
6.5
820
10,300 PSI
Bullet: 230 GR. Cast LRNFP
Dia. .452"
COL: 1.580"
Trail Boss
5.5
685
9,100 PSI
6.5
802
12,400 PSI
Bullet: 250 GR. Cast LRNFP
Dia. .452"
COL: 1.600"
Trail Boss
4.5
606
8,800 PSI
5.8
727
12,700 PSI
             
454 CASULL
Case: Freedom Arms
Twist: 1:24"
Barrel: 9.375"
Trim: 1.380"
Primer: Winchester SR
Bullet: 250 GR. MEI LRNFP
Dia. .452"
COL: 1.680"
Trail Boss
6.7
862
14,800 CUP
9.0
1011
19,300 CUP
Bullet: 265 GR. CPB LFPGC
Dia. .452"
COL: 1.700"
Trail Boss
7.0
836
18,800 CUP
9.0
984
27,100 CUP
Bullet: 300 GR. CPB LFPGC
Dia. .452"
COL: 1.800"
Trail Boss
6.5
767
14,900 CUP
8.0
865
23,900 CUP
Bullet: 325 GR. CPB LFNPB
Dia. .452"
COL: 1.760"
Trail Boss
5.0
636
13,600 CUP
7.0
798
23,700 CUP
Bullet: 335 GR. CPB LFNGC
Dia. .452"
COL: 1.770"
Trail Boss
4.8
618
15,500 CUP
6.8
778
25,600 CUP
Bullet: 360 GR. CPB LFNGC
Dia. .452"
COL: 1.760"
Trail Boss
5.0
615
18,000 CUP
6.0
699
27,300 CUP
Bullet: 395 GR. CPB LFNGC
Dia. .452"
COL: 1.770"
Trail Boss
4.0
519
19,200 CUP
5.0
607
23,600 CUP
             
460 S&W MAGNUM
Case: Starline
Twist: 1:20"
Barrel: 10.743 "
Trim: 1.790"
Primer: Winchester LRM
Bullet: 325 GR. CPB LFNPB
Dia. .452"
COL: 2.200"
Trail Boss
7.0
734
16,500 PSI
11.0
914
20,400 PSI
Bullet: 335 GR. CPB WLNGC
Dia. .452"
COL: 2.180"
Trail Boss
7.0
726
17,700 PSI
10.0
887
22,200 PSI
Bullet: 360 GR. CPB WLNGC
Dia. .452"
COL: 2.190"
Trail Boss
7.0
712
19,600 PSI
9.0
827
24,200 PSI
Bullet: 395 GR. CPB WLNGC
Dia. .452"
COL: 2.185"
Trail Boss
7.0
695
21,100 PSI
8.0
754
24,000 PSI
             
480 RUGER
Case: Hornady
Twist: 1:18"
Barrel: 7.5"
Trim: 1.275"
Primer: Winchester LP
Bullet: 355 GR. BTB LFNGC
Dia. .476"
COL: 1.630"
Trail Boss
5.0
621
16,700 PSI
6.5
740
22,700 PSI
Bullet: 370 GR. CPB LFP
Dia. .475"
COL: 1.640"
Trail Boss
4.5
597
16,000 PSI
5.7
689
20,900 PSI
Bullet: 405 GR. CPB (w/GCK)
Dia. .475"
COL: 1.620"
Trail Boss
3.5
469
15,200 CUP
5.5
645
25,700 CUP
Bullet: 420 GR. BTB LFNGC
Dia. .476"
COL: 1.640"
Trail Boss
3.5
467
16,200 PSI
5.0
597
24,300 PSI
             
475 LINEBAUGH
Case: Hornady
Twist: 1:20"
Barrel: 8"
Trim: 1.390"
Primer: Winchester LP
Bullet: 370 GR. CPB LFP
Dia. .475"
COL: 1.770"
Trail Boss
6.0
661
16,000 PSI
8.5
824
27,500 PSI
Bullet: 405 GR. CPB LFPGC
Dia. .475"
COL: 1.745"
Trail Boss
5.5
603
19,000 PSI
7.5
732
29,600 PSI
             
500 LINEBUAGH
Case: Starline
Twist: 1:20"
Barrel: 8"
Trim: 1.400"
Primer: CCI 350
Bullet: 410 GR. LFP
Dia. .511"
COL: 1.800"
Trail Boss
8.5
752
15,400 PSI
10.0
815
17,400 PSI
Bullet: 425 GR. LFP(w/GCK)
Dia. .511"
COL: 1.800"
Trail Boss
7.5
664
13,100 PSI
9.5
768
16,400 PSI
Bullet: 450 GR. MT. BAL LWSC
Dia. .512"
COL: 1.840"
Trail Boss
9.2
759
19,700 PSI
10.0
800
25,000 PSI
Bullet: 468 GR. LFP
Dia. .511"
COL: 1.800"
Trail Boss
7.3
640
14,400 PSI
9.2
730
18,100 PSI
             
500 WYOMING EXPRESS
Case: Freedom Arms
Twist: 1:20"
Barrel: 9 "
Trim: 1.360"
Primer: Federal 210
Bullet: 350 GR. HDY XTP
Dia. .500"
COL: 1.740"
Trail Boss
7.0
624
20,700 PSI
10.0
831
26,700 PSI
Bullet: 370 GR. CPB LGC
Dia. .500"
COL: 1.740"
Trail Boss
7.0
698
19,100 PSI
10.0
859
23,800 PSI
Bullet: 400 GR. CPB LGC
Dia. .500"
COL: 1.750"
Trail Boss
8.0
738
23,200 PSI
10.0
842
28,000 PSI
Bullet: 440 GR. CPB LGC
Dia. .500"
COL: 1.740"
Trail Boss
6.0
600
20,100 PSI
8.0
717
24,800 PSI
             
500 S&W MAGNUM
Case: Starline
Twist: 1:18"
Barrel: 10 "
Trim: 1.615"
Primer: Winchester LR
Bullet: 370 GR. CPB LGC
Dia. .500"
COL: 2.020"
Trail Boss
8.0
746
13,500 PSI
12.0
926
19,000 PSI
Bullet: 440 GR. CPB LGC
Dia. .500"
COL: 2.025"
Trail Boss
7.0
643
14,600 PSI
10.0
799
21,200 PSI