Hi buckstix. The rear trigger in mine is only slightly heavier than the front. Now I'm not sure of the correct terminology but here's a description of what is inside mine. The rear trigger mechanism has a recoil operated interceptor that blocks the sear arm of the LH barrel so it stops the sear from tripping on that side when the other (RH) is fired. It doesn't have the interceptor on the RH barrel sear mechanism.

Mine will fire both barrels almost guaranteed if the LH barrel (rear trigger) is fired first. I've also played around (unloaded) with the front trigger - it's articulated. If the front trigger is pushed forward and allowed to spring back by itself it will fire that barrel.

I'm happy to live with this and always fire RH barrel first. The manual says to do this for regulation purposes (I don't really believe this) and it doesn't mention anything about having both barrels fire if the LH barrel is fired first - but it makes me wonder why there is only 1 interceptor.

In the case of the butt stock rattle - there is a steel cylinder bar in the butt stock that adds weight to balance the rifle (and reduce recoil). It has a steel plate that screws into the weight (with a metal thread screw, or bolt) and a timber screw to hold it into the timber. Apparently it's fairly common for the heavy kickers (470NE & 500NE) to snap the head off the wood screw due to recoil. Then the weight can slide fore and aft in the recess in the stock, and rattle. This happned to mine and I haven't yet repaired the wood screw (or extracted what's left in the timber of it) and have used O-rings instead to tighten the fit of the bar in the stock - seems to have worked well.

The balance, fast sight acquisition and excellent regulation far outweigh these issues for me.

It regulates well with 570gn and 450gn copper projectiles (both using 106gn AR2209, and Woodleighs of course) and even 430gn cast with Trailboss.