encore scopes

close second. Nikon scopes are good too. Whatever you do, don't buy cheap scopes for the 510 GNR. Stay with one of the 3 mentioned above and of the 3 go with the one you see as the clearest. My humble opinion.

It has held up quite well and I have put a lot of rounds though that barrel.

I have taken several pigs with this rig. It is Gary's 510 Prototype Barrel in that caliber. So far the scope has held up well. Just my 2 cents worth. Use one that is clearest for your eyes and has a good sharp reticle.

1st choice would be Burris 4x. To my eyes, the Leupold's are finicky about getting lined up. I've had a 4x Burris on my Encore 9" 429GNR no brake, with no problems. At the last HHC, I could quickly pick up a moving hog at 50 yds and put the bullet right behind the shoulder. Use the Leupold dual dovetail rings and a drop of epoxy under the base. I took 2 Encores from the east coast to Alaska and back and both guns held zero out and back. One was the Burris 4x and the other was Burris 2-7x. I suppose those Fastfires are another option too, don't know how they'd stand up to the recoil of a 510.