IMR RIFLE DATA

TRAIL BOSS

NEVER Exceed the Loads Listed Here

DO NOT USE ANY FILLER MATERIAL WITH THESE LOADS, as fillers can alter pressure and velocities decidedly. Velocities were limited to approximately 1600 f.p.s. due to excessive leading at higher velocities. Use flat point bullets in tubular magazines. Call 913-362-9455 for more information.

STARTING LOADSMAXIMUM LOADS
POWDERGRS.VEL.PRESSUREGRS.VEL.PRESSURE
 
25-35 WINCHESTER
Case: Winchester
Twist: 1:8"
Barrel: 24"
Trim: 2.033"
Primer: Winchester LR

Bullet: 90 GR. LFP W/GCK
Dia. .257"
COL: 2.320"
Trail Boss
5.5
1224
22,000 CUP
8.0
1414
23,200 CUP
       
30-30 WINCHESTER
Case: Winchester
Twist: 1:12"
Barrel: 24"
Trim: 2.030"
Primer: Winchester LR

Bullet: 160 GR. CAST LFN
Dia. .308"
COL: 2.485"
Trail Boss
6.5
997
20,500 CUP
9.0
1195
29,100 CUP
       
32-40 WINCHESTER
Case: Winchester
Twist: 1:16"
Barrel: 24"
Trim: 2.120"
Primer: Remington 2 1/2

Bullet: 196 GR. HOCH
Dia. .324"
COL: 2.555"
Trail Boss
5.0
833
12,500 CUP
6.0
935
25,300 CUP
       
38-55 WINCHESTER
Case: Winchester
Twist: 1:18"
Barrel: 24"
Trim: 2.075"
Primer: CCI 200

Bullet: 250 GR. LYMAN CAST
Dia. .376"
COL: 2.500"
Trail Boss
6.0
842
20,300 CUP
7.0
911
25,600 CUP
       
40-65 WINCHESTER
Case: Winchester
Twist: 1:16"
Barrel: 24"
Trim: 2.095"
Primer: Winchester LR

Bullet: 400 GR. LRNFP
Dia. .409"
COL: 2.780"
Trail Boss
11.0
889
20,000 CUP
12.0
915
21,200 CUP
       
45-70 GOVERNMENT
Case: Winchester
Twist: 1:20"
Barrel: 24"
Trim: 2.100"
Primer: CCI 200

Bullet: 300 GR. CAST LFP
Dia. .458"
COL: 2.465"
Trail Boss
14.0
1199
14,400 CUP
16.5
1285
20,900 CUP

Bullet: 405 GR. LRNFP
Dia. .458"
COL: 2.540"
Trail Boss
12.0
971
24,500 CUP
13.0
1007
25,600 CUP