OK, Fedora. On my screen I measure the crown base front, to crown base back of your HJ at 37 mm on my screen, and the top front to top back corners at 37 mm also. The Raiders hat measures 63mm base... 66mm top.
Someone else measure! I can't get the same results!!
I get reverse taper, and quite a bit, on the back of the hat, visibly. And this is from a block shape that does have some taper built into the block. I know, from experience, that if the original blockshape of this particular HJ was stovepiped, the reverse taper on the back of this hat, would make your eyes bleed.
I think the film's hat reverse taper was a particular, and peculiar relationship between the shape of the dome, and the degree of taper(not much taper, but some taper) on the front and back of the hat. Then, the correct, or original radius of the curvature, front and back comes into play. With that said, I am fully aware that not only one block shape is capable of lending a decent looking Raiders fedora.
And, I also realize that your stovepipe block does lend a great Raiders fedora. I went there a couple of years ago but when I saw the extreme amount of reverse taper on the back of the experimental hats, I moved on to a more traditional approach, brought on by looking at many different existing vintage blockshapes. I, and Marc, came to the conclusion that the original did have some taper on the front and back, but much less than many traditonal blocks. Then, when I actually saw hat blocks that featured only a slight amount, that sort of nailed it for me. I learned of the relationship of the front and back radius, with the dome and the degree of taper, and came up with a block design that yielded good results. Then, when this vintage HJ came into my hands, I saw basically the same shape that we had reverse engineered. I figured we had hit a home run.
What we must guard against is making a caricature of the Raiders fedora.(by overemphasizing certain aspects) I think we must really look at all of the Raiders fedoras, and not concentrate on just one particular profile. Not all of the Raiders fedoras featured a highly visible reverse taper. So, when trying to duplicate the hat, we must be sure that our blockshape is capable of producing the looks of all of the hats, and not just one. Afterall, one blockshape did create all of those looks that we see in the films. That I can get reverser taper with a tapered block shape, should say something. Regards, Fedora
We see Ford putting the hat on twice, The Sunset shot on top of the Well of Souls, and the Buonus DVD in the WACO biplane. They are both very similar. In the Sunset shot, he hooks the front on his brow with his left hand holding the front of the crown and pulls the back down by the brim with his right hand, then he switches both hands to the front of the brim and snugs the front down. It's obvious the hat is an EXTREMELY tight fit. I used to think they possibly put extra stuffing in sweatband just to keep the hat on in the high wind in that shot----but the hat looks just as tight in the WACO. He uses BOTH hands on the back of the brim to pull the back down first, then BOTH hands closer to the front of the brim to pull the front down- Even the tightest hat I own I put on just with one hand on the front pinch! SO, what we think is caused by some taper in the front and back of the block, is only there because the bottom of the hat is being stretched? Consider this HJ of Fedora's that is like his AB's blockwise 
and the Raider's hat on the Wizard's table. 
The front of the film hat is more vertical. You could say the front dents aren't as deep or perhaps there is side taper, but I think the one from Raiders is a 360 stovepipe... probably too tight to be worn comfortably. 
... if it's really a stovepipe... where are the "classic" marks that you showed in other threads? It looks very smooth in that pic. No orizontal marks 
But, it did have some taper as viewed from the front. Like you, I cannot drop my blocked hats down too low in the back, that is, past the point where it looks too low, when compared to the film hats. You get past a certain point, and the hat starts to **** in and taper. Now, on a really super soft, vintage Borsalino type felt, this does not occur. Alot of it has to do with the felt itself. And of course, the open crown height figures into the equation as well. 