The ultimate long range varminting caliber in my opinion; the 6x284.
The 6x284 is the ultimate long range varmint caliber if your looking for velocity and accuracy. There are other excellent long range varmint calibers like the 243, 6mm Remington, 243AI and 6mmAI. However, the 6x284, IMO, is the king of the 6mm calibers.
The 6x284 is a very low recoiling caliber in a semi heavy rig. This makes it awesome to shoot. It's very fast, accurate and devastating on varmints. It's only draw back is that it's hard on barrels.
I think one of the best long range bullets for long range varminting is the 87grn V-Max. I know the VLD bullets have better BC, however, the 87grn V-Max combines excellent BC with awesome killing power when driven out of the 6x284. In my last 6x284, I was able to drive the 87grn V-max, out of a 30" barrel at a velocity of 3730fps. It was devastating and accurate on varmints out to 1000yards. I am currently in the process of building a new 6x284.
Here is the ultimate set up for long range varminting. This is also the specs on my long range varmint rig;
1. 6x284 .272 tightneck
2. Nesika Model L, 1.70 diameter Action.
3. Krieger 30", 1-8.5 twist, 1.450 Straight taper barrel.
4. McMillan Tooley MBR, 5 pounds lead added to rear, front stud for bi-pod.
5. Jewel 2oz trigger.
6. Vias Muzzle brake.
7. Davidson 20MOA scope base.
8. Kelby 30mm rings.
9. Nightforce 12x42x56mm NXS with NP-R2 Reticle.
10. Weight of rifle, 32 pounds with scope.
This is a heavy set up, but it's for long range varminting.
Equipment opinions;
1. The best actions you can get for a long range varminting rig would be a custom action like a Nesika or BAT. However, a Remington 700 action, trued and squared, is pretty close to a custom.
2. The barrel should be either a Krieger, Hart, Lilja, ect. I've had really good success with Kriegers in 6mm caliber. The diameter should be at least a Light to Heavy varmint diameter, or heavier. The barrel should be between 28" to 30"s.
3. The twist rate should be between a 1-8 to 1-10 twist barrel. These twist rates will allow you to shoot 6mm bullets between 80 to 107grns.
4. The trigger should be a Jewel, Shelin, Rifle Basix or a Remington trigger worked on. However, the Jewel or Shelin would be the best choice.
5. Stock choices are plentiful, however, I would highly recommend the following for long range varminting; The McMillan Tooley MBR or The Shehan Tracker.
6. Muzzle brake choice, if you shoot of the ground, I would look at the Holland brake. If you shoot of a bench, I would highly recommend the Vias.
7. Weight of rifle should be at least 12 pounds. The heavier the better, however, you don't want the rifle to be to heavy. IMO, 35 pounds is heavy enough.
8. Choices for optics are plentiful too. The Nightforce NXS scopes are awesome, however, Leupolds are great too. If $$$ is not a problem, get the Nightforce NXS.
9. Brass choices, use Lapua or Norma.
10. Bullet choices; if your shooting for long range varminting and using a 6mmx284, the 87grn V-Max is the ultimate long range bullet. The 105grn and the 107grn bullets are better ballisticly, however, they don't kill as well as the 87grn V-Max. The great thing about choosing the 6mm for varminting, is there are plenty of bullets to choose from.
11. If you buy a factory rifle, The new Savage Model 12 Long Range Precision is very nice and affordable. The Remington 700 VSSF II is a great choice too.
Definitely go with one of the 6mm's for long range varminting. However, if you want the ultimate long range caliber for varmining, the 6x284 is definitely the king of the 6mm's if you want velocity and accuracy.
Good luck with your caliber hunt. Let us know what you decided on.
Wildcat