All of them that I have built have been benchrest 1000yd light guns so they are single shot actions. I have built on a Lawton 7500 Short action, a Savage Model 12 and a Defiance Long action. I like the Lawton by far the best and of course the Savage comes in last. There is nothing wrong with the Savage, it just isn't in the same class as a custom action. I am thinking about doing one on a Savage 110 Short action this winter, only because I have all the components on hand to do it, not because it is "better mousetrap". I am sure that if I decide to make it feed form the magazine it will be an interesting endeavor. I am also considering making it a 6.5 Creedmoor though.
James