Lilja Barrel Contour Data
Barrel Contour Data
Types of Contours: | Straight Tapers l Palma Contours l Rimfire Contours l Octagon Special Straight Tapers l Factory Contours l 15″ Long XP-100 Type l AR-Type Barrels For our special contour policy – Click Here Contoured Barrels:
| Lilja Contour Number | A | B | C | D | E | F | Approx. Weight at “F” Length in .30 caliber | Weight per inch at “C” Diameter in .30 caliber |
|---|---|---|---|---|---|---|---|---|
| 1 | 1.200″ | .700″ | .525″ | 2.50″ | 6″ | 27.0″ | 2.55 lbs. | .040 lbs. |
| 2 | 1.200″ | .750″ | .575″ | 2.50″ | 6″ | 27.0″ | 2.90 lbs. | .052 |
| 3 | 1.200″ | .800″ | .625″ | 2.75″ | 6″ | 27.0″ | 3.29 lbs | .065 |
| 4 | 1.200″ | .825″ | .650″ | 2.75″ | 6″ | 27.0″ | 3.47 lbs | .072 |
| 5 | 1.250″ | .875″ | .700″ | 3.00″ | 6″ | 27.0″ | 4.00 lbs | .087 |
| 6 | 1.250″ | .925″ | .750″ | 3.25″ | 6.5″ | 27.0″ | 4.45 lbs | .103 |
| 7 | 1.250″ | 1.000″ | .825″ | 3.50″ | 6.5″ | 27.0″ | 5.13 lbs | .128 |
| 8 | 1.250″ | 1.075″ | .900″ | 3.50″ | 6.5″ | 27.0″ | 6.00 lbs | .156 |
The above contours listed are our standard contours. Our standard length contoured and straight taper barrels listed above are furnished 28″ long, with 27″ useable. All contoured barrels have a taper of .008″ per inch between the B and C diameters shown above, so the muzzle diameter for a shorter barrel would be proportionately larger. The radius of the contoured section is 30″, tangent to the barrel at the “B” dimension point. On request we can make barrels of #4 contour or larger up to a 30″ finish length (see pricing). The #4 contour can be fluted in .30 caliber and smaller.
XP-100 tpye barrels 15″ long, for contour listing – Click Here
Estimating Weights. The weights listed above are for a 27″ long barrel in .30 caliber. For estimating the weights of shorter barrels, subtract the figure in the weight-per-inch column from the weight in the 27″ length column. For example the weight for a 27″ #5 contour is listed above at 4.00 pounds. For a 24″ length: 4.00 – (3 x .087) = 3.74 pounds. Keep in mind that these are approximate weights and that calibers other than .30 will weigh more or less. At a 27″ length a .224 caliber barrel will weigh .247 pounds more than a .30 caliber barrel. Threading and chambering would typically reduce the weight by about .20 pounds. The weight removed by fluting depends on the caliber, contour and finish length. On a typical #5 contour with a 26″ finish length, in .30 caliber fluting would remove about .50 pounds, reducing it to about the weight of a #4 contour. Our normal stopping point for flutes at the muzzle end of the barrel is 1.5″ short of the requested finish length.
To download an Excel file that will calculate the weights of our standard contours very accurately at different lengths and calibers – Click Here.
We can also duplicate some factory barrel contours like the Remington contours including the Varmint / Sendaro contours and the Winchester model 70, Weatherby and a few others. There is a $40 extra charge for these special contours if we do not already have a CNC program for that particular contour. For a listing of existing factory contours – Click Here.
Octagon barrels can be milled. Please inquire about your specific dimensions. We work from across-the-flats dimesions. For more information on octagon barrels – Click Here
Straight Taper Benchrest Barrels:
| Barrel Taper | A | C | D | F | Approx. Weight at “F” Length |
|---|---|---|---|---|---|
| NBRSA HV Taper | 1.250″ | .925″ | 5.0″ | 27.0″ | 6.75 lbs. |
| 1.200 HV Taper | 1.200″ | .875″ | 5.0″ | 27.0″ | 6.25 lbs. |
| NBRSA Hunter | 1.250″ | .725″ | 4.0″ | 27.0″ | 5.75 lbs. |
| M24 (taper 140, 197) | 1.200″ | .900″ | 5.0″ | 27.0″ | 6.45 lbs. |
| MTU(taper 169,185) | 1.250″ | .930″ | 3.0″ | 26.0″ | 6.77 lbs. |
| Mk13 Mod7 | 1.250″ | .800″ | 4.0″ | 26.0″ | 6.13 lbs. |
| Tactical | 1.200″ | .780″ | 4.0″ | 27.0″ | 5.65 lbs. |
| Palma Barrel Designation | A | B | C | D | E | F | Approx. Weight at “F” Length in .30 caliber |
|---|---|---|---|---|---|---|---|
| #7 x 30″ | 1.250″ | 1.000″ | .800″ | 3.5″ | 6.5″ | 30.0″ | 5.50 |
| Palma 28 | 1.250″ | .950″ | .795″ | 5.0″ | 8.5″ | 28.0″ | 5.25 |
| Palma 30 | 1.250″ | .950″ | .780″ | 5.0″ | 8.5″ | 30.0″ | 5.48 |
| Palma 30B | 1.250″ | .950″ | .815″ | 5.0″ | 8.5″ | 30.0″ | 5.62 |
| Palma 30C | 1.250″ | .980″ | .760″ | 3.5″ | 6.5″ | 30.0″ | 5.20 |
| Palma 31B | 1.250″ | .950″ | .810″ | 5.0″ | 8.5″ | 31.0″ | 5.92 |
| Palma 32 | 1.250″ | .950″ | .760″ | 5.0″ | 8.5″ | 32.0″ | 5.68 |
| PalmaLight33 | 1.250″ | .900″ | .760 | 3.5″ | 6.5″” | 33.0″ | 5.16 |
| PalmaHeavy33 | 1.250″ | .950″ | .780″ | 3.0″ | 6.0″ | 33.0″ | 5.45 |
| Palma 34 | 1.250″ | .950″ | .745″ | 5.0″ | 8.5″ | 34.0″ | 5.89 |
| Palma34B | 1.250″ | .980″ | .760″ | 3.5″ | 6.5″ | 34.0″ | 4.73 |
| Palma 35A | 1.250″ | .980″ | .760″ | 4.5″ | 7.5″ | 35.0″ | 6.09 |
| Palma 35B | 1.250″ | .980″ | .760″ | 3.5″ | 6.5″ | 35.0″ | 5.92 |
This is an image of our AR Wasp contour turned on the AR750 contour and fluted ahead of and behind the gas block. This blank is 24″ long and weighs 2.74 pounds as shown. 