oooohhhhhh NO Mr. Bill....sounds good, but not really....It is pretty well established that ALL firearms with forearms attached to the barrel OR attatched some other place that touch the barrel will cause some kind of accuracy problems...
My premise was working up a load without the forend...shooting without the forend if you set the frame on the "bench" will only show there IS/WAS/MIGHT BE a problem...and you already know there is a high probability of one, the information is scattered all over NEF forums...is it in the forend or in the latch/lockup, loose headspace...loose stock...scope, ammo, shooter...etc. Shooting a few loads "might" confirm the fact, just "think" the fact was confirmed, or just make things worse...but again...what use is it? You STILL have to address the very familiar forend problem. I just don't see the logic in it or that it is of much value...but I wouldn't want to cause anyone roadrash...if you feel it is helpful then do it...besides, you probably will derive much more value in the handling of your shooter if you practice good breath control, trigger control and target acquisition.

And it is only a problem if the accuracy ISN'T up to what you want. For normal hunting accuracy the NEF as is will do all that is required...it only becomes a "problem" IF you want better accuracy. Some people's idea of "good'n'uff" accuracy is keeping a few rounds inside a pie plate at 50 yds...mine is a skoosh smaller groups.
I've worked with T/C Contenders, T/C Encores, NEF, Ruger #1's, various falling blocks and so forth over the years and bar none...you have to deal with the forend ALONG with all the rest of the various problems associated with each brand of shooter.
Again...not trying to stir the pot...just some thoughts that occured to me way long time ago when I used to accurize Ruger #1's, that impinge on the NEF. I built a nice benchrest holder I could set the Ruger #1 forend hanger in to test fire. Can't do it with the NEF. Yout can't really "free float" the barrel either...the best you can do is find a "sweet spot" on the forend where you normally hold the rifle and work up a load that shoots the best while holding it there as uniformly as possibly.
I steel epoxy full bed the forents right from the gitgo INCLUDING making a metal pillar so the forend is locked on metal to metal. I've even made some solid aluminum forends, full bedded in steel epoxy, aluminum hangers that mount solidly to TWO forend mounts on the barrel and fit into an aluminum bedding block in an oversized forend WITH pillars and full bedded in steel epoxy held on by 1/4" button head machine screws, torqued down.
Anything beyond pillars and epoxy steel full bedding is overkill and doesn't seem to make much difference, but it is quick and easy to do and starts you out on the right foot...and finding a load and sweet spot can't be overstated
It's fairly difficult to get the point across to work with and through problems that aren't actually problems except in certain circumstances.
And as Mac says(and me... more times than I should) each rifle is has it's own idea of of how the cabbage ate the cow, YOU have to find it, and it's NEVER simple.
Luck