Barrel products

MullerWorks rifle barrels are available in a select range of the calibers, grooves, and twist that Dan believes are proven to perform to his standards.

The standard rifle barrel length for 1.250" and 1.350” diameter steel is 29 inches. For .250" diameter steel, 27" is the standard length. Longer lengths are available at an additional charge.

For centerfire barrels, the 4 groove modified is the standard used; however, other landforms are available. For rimfire barrels, customers may select the 4 groove modified, 8 groove modified, 5R, or 7R landform.

The CNC machining process allows for a wide range of twist rates. The standard twist rates for single point cut and button barrels are listed below. Note: for single point cut barrels, other twist rates are available.

Barrel products

MullerWorks rifle barrels are available in a select range of the calibers, grooves, and twist that Dan believes are proven to perform to his standards.

The standard rifle barrel length for 1.250" and 1.350” diameter steel is 29 inches. For .250" diameter steel, 27" is the standard length. Longer lengths are available at an additional charge.

For centerfire barrels, the 4 groove modified is the standard used; however, other landforms are available. For rimfire barrels, customers may select the 4 groove modified, 8 groove modified, 5R, or 7R landform.

The CNC machining process allows for a wide range of twist rates. The standard twist rates for single point cut and button barrels are listed below. Note: for single point cut barrels, other twist rates are available.

Single point cut barrels
Caliber Twist Rate
.2048, 9, 10, 11, 12
.22rf 16
.22 cf 6, 6.75, 7, 7.5, 7.8, 8, 9, 10, 12, 14
6 mm 7, 7.5, 7.75, 8, 9, 10, 12, 13, 13.5, 13.75, 14
.25 7, 7.25, 7.5, 8, 9, 10, 12
6.5 mm 7, 7.5, 8, 8.5, 9
7 mm 8, 8.25, 8.5, 8.75, 9
.30 8, 8.5, 9, 9.5, 10, 11, 12, 13, 15, 17
.338 8, 8.5, 9, 9.3, 10
.375 8, 9, 10, 12, 14
Button barrels
Caliber Twist Rate
.22rf16
.22 cf 7, 8, 9, 12, 14
6 mm 7, 7.5, 8, 9, 10, 12, 13.5, 13.75, 14
.25 7, 10
6.5 mm 7.5, 8, 8.5, 9
7 mm 8, 8.5, 9
.30 8.5, 10, 11, 12, 13, 17
.338 9.5

Contours

MullerWorks barrels may be ordered in a range of standard contours. Custom contours may be available; however, additional set-up and programming charges will apply.

Sporter A B C D E F G
#3 1.250” 0.815” 0.625" 2.5” 6.0” 24” 27”
#4 1.250" 0.860" 0.650" 3.0" 6.0" 26" 27"
#5 1.250" 0.910" 0.700" 3.0" 6.0" 26" 27"
#6 1.250" 0.960" 0.750" 3.0" 6.0" 26" 27"
Tactical A B C D E F G
#1 RV 1.250" 0.940" 0.830" 3.0" 7.0" 26" 27"
#2 Sendero 1.250" 0.985" 0.875" 3.0" 7.0" 26" 27"
#3 M24 / M40 1.200" n/a 0.900" 4.0" n/a 26" 27"
#4 AMU / MTU 1.250" n/a 0.900" 5.0" n/a 29" 30"
Palma A B C D E F G
Light 1.250" 0.900" 0.750" 3.0" 5.0" 30" 31"
Medium 1.250" 0.900" 0.820" 3.0" 5.0" 30" 31"
Heavy 1.250" 1.000" 0.900" 3.0" 5.0" 30" 31"
Target A B C D E
#1 HBR 1.250" 0.750" 4.0" 26" 27"
#2 LV 1.200" 0.870" 4.0" 26" 27"
#3 LV 1.225" 0.875" 4.0" 26" 27"
#4 LV 1.250" 0.840" 4.0" 26" 27"
#5 LV 1.250" 0.875" 4.0" 26" 27"
#6 LV 1.250" 0.940" 5.0" 26" 27"
#7 Max HV 1.250" 0.940" 6.0" 26" 27"
# 8 1000 YD 1.250" 0.940" 6.0" 30" 31"
#10 Straight 1.250" n/a n/a 26" 27"
1.350 Straight 1.450" n/a n/a 26" 27"
Rimfire A B C D E F G
.875 Straight 0.875" n/a n/a n/a n/a 26" 27"
.900 Straight 0.900" n/a n/a n/a n/a 26"
27"
Ross Taper 1.250" 0.875" 0.875" 3.0" 6.0" 26" 27"

Rimfire A B C D E F G H I J
Eck Sporter 1.125" 0.700" 1.150" 5.0" 5.5" n/a 27" 3.0" 3.5" 0.800"
v