When it comes to explosiveness and accuracy, from 0 to 600 yards, the 6BR is king on small varmints. It might not be the fastest cartridge, however, it so darn accurate it's awesome! I've owned and used the following cartridges for varminting, 220 Swift, 243AI, 6MM AI and 6x284. In my early days of varmint hunting, I thought a bigger cartridge, shooting a light bullet, at high velocity would be king. Well, I found out just how wrong I was when a buddy of mine should up with his custom 6BR for our varmint hunt. I of course was using a my 6x284 with an 87grn V-Max being pushed at 3700fps. I thought I would be able to out shoot him at the longer as well as the short range shots, I was wrong! We were shooting ground squirrels from 0 to around 620 yards, and my buddy was hitting everything he shot at with his 6BR. He too was using a 87grn V-Max, however, he was only pushing them at 3100fps. I was amazed how accurate the 6BR was and how explosive it was even at the longer ranges. I am not trying to say the 6BR is more explosive on varmints than the 6x284, however, I am saying the 6BR will out shoot a 6x284 at ranges from 0 to 600 yards. At longer distances, the 6x284, with a VLD bullet is very impressive out to 1000 yards.
I too, had to learn that speed is not everything. I learned, on that day, that a 6BR was an awesome, accurate and explosive cartridge. After a couple of varmint hunting trips with my buddy and his 6BR, I decided it was time to have a 6BR built. I sold my 220 Swift, 243AI and the 6MM AI to fund a fully custom 6BR with a Nightforce NXS 8x32x56 and the reloading tools and components to go along with it.
The other great thing about the 6BR is that a 1-8 twist barrel will allow you to shoot bullets from 70grns to 105grns. This gives the varmint hunter a variety of bullet options for his varmint hunting trip. If your wondering, I kept the 6x284 and had it re-barreled with a 1-8 twist barrel for the 700 and 1000 yards shots when they come available. Another great thing about the 6BR, it has a ton of barrel life which makes it very nice when you have a target rich environment.