The Montana Rifleman only makes
one grade of barrels. This is Premium Grade.
All barrels are completely hand-lapped to assure that you only receive the best
quality.
|
Contour
|
#
|
A
|
B
|
C
|
D
|
E
|
Maximum Length
|
Estimated Weight
|
Max Bore Size
|
|
U/L Sporter
|
1
|
1.180
|
2.25
|
2.5
|
.800
|
.570
|
22"
|
2.5
|
.300
|
|
L/W Sporter
|
2
|
1.200
|
2.5
|
2.5
|
.840
|
.600
|
24"
|
3
|
.330
|
|
Reg. Sporter
|
3
|
1.200
|
2.5
|
2.5
|
.860
|
.625
|
26"
|
3.25
|
.350
|
|
Med. Sporter
|
4
|
1.200
|
2.625
|
2.5
|
.880
|
.650
|
28"
|
4
|
.375
|
|
Hvy Sporter
|
5
|
1.200
|
2.75
|
2.5
|
.935
|
.700
|
28"
|
5
|
.416
|
|
PH Sporter
|
#1
|
1.200
|
3
|
2.5
|
.
|
.985
|
26"
|
6
|
.
|
|
PH Sporter 2
|
#2
|
1.200
|
3.25
|
2.5
|
.
|
1.035
|
26"
|
7
|
.
|
|
Contour
|
#
|
A
|
B
|
C
|
D
|
Maximum Length
|
Estimated Weight
|
|
Light Target
|
6
|
1.200
|
3
|
21-23
|
.750
|
32"
|
6
|
|
Medium Target
|
7
|
1.200
|
3.125
|
21-23
|
.875
|
32"
|
7
|
|
Heavy Target
|
8
|
1.200
|
3.25
|
21-23
|
1.00
|
32"
|
8
|
All dimensions are "approximate".
We do not guarantee these dimensions and reserve the right to change them at any
time.
Octagon Contours
Please note that their are no "standard" dimensions in a octagon barrel. If you desire specific dimensions please use these drawings. Email us for current prices, Rifle.Builder@z-hat.com or better yet check our online Catalog for these custom order barrels.
Bores, Grooves, Twists Rates
|
CALIBER
|
BORE/GROOVE
|
TWISTS AVAILABLE
|
|
17
|
.168/.172
|
7 1/2, 9, 10
|
|
19
|
.193/.198
|
12, 14
|
|
204
|
.199/.204
|
9, 11
|
|
22 Rim Fire
|
.218/.222
|
16
|
|
22 Center Fire
|
.219/.224
|
8, 9, 10, 12, 14
|
|
6mm/243
|
.237/.243
|
8, 9, 10, 12, 14
|
|
25
|
.250/.257
|
8, 10, 14
|
|
6.5
|
.256/.264
|
7 1/2, 8 1/2, 9, 10
|
|
270
|
.270/.277
|
10, 12
|
|
7mm
|
.277/.284
|
8, 9 1/2, 10, 12
|
|
30
|
.300/.308
|
8, 10, 12
|
|
303
|
.303/.311
|
10, 18
|
|
32-40
|
.312/.320
|
16
|
|
8mm
|
.315/.323
|
10
|
|
338
|
.330/.338
|
10, 12, 16
|
|
348
|
.340/.348
|
12
|
|
9mm
|
.347/.355
|
10
|
|
357 Pistol
|
.350/.357
|
18
|
|
35
|
.350/.358
|
12, 16
|
|
9.3
|
.358/.366
|
14
|
|
375/38-55
|
.368/.376
|
12, 16, 18
|
|
40 S & W
|
.392/.400
|
16
|
|
38-40
|
.395/.405
|
20
|
|
40
|
.397/.405
|
14, 20
|
|
40
|
.400/.408
|
13, 20
|
|
40 AE
|
.400/.409
|
18
|
|
41
|
.402/.409
|
18
|
|
405
|
.405/.413
|
14
|
|
416
|
.408/.416
|
14
|
|
404/425
|
.416/.424
|
14
|
|
44
|
.422/.429
|
16, 24
|
|
43 Spanish
|
.430/.439
|
20
|
|
45 Pistol
|
.442/.450
|
20
|
|
45
|
.450/.458
|
10, 14, 16, 18, 22
|
|
475
|
.467/.475
|
10, 20
|
|
50 AE
|
.492/.500
|
18
|
|
50
|
.500/.5095
|
36
|
|
50
|
.500/.510
|
15, 16, 20, 28
|
