I will slightly disagee with the previous post:)
The Grizzly 190s are hard steel and do require proper tools to sharpen. Use the wrong tools and/or the wrong technique, and you'll chase your tail in circles.
The current 190 Grizzly will come out of the pack with a fairly broad range in weight. This has no bearing on the sharpened head. The current head comes out of the pack with a bevel fairly close to 30degrees. The least amount of work would be to keep the bevel at that angle and remove steel until that bevel intersects with the back edge. If you properly sharpen your Grizzly at this approximate bevel, your end product will be fairly close to 180 grains and the weights between heads will be very close.
Many, including myself, like to change the bevel to somewhere around 25degrees. This will require more work and more steel removal. Wrong tools and/or techniques and you will screw yourself into the ground with a migraine. If you change the bevel and properly sharpen the Grizzly, the product will be fairly close to the 170-175 grain range and will be very consistent in weight.
Now to the sharpeners. The broadhead sharpener will cut a flat bevel, but it is pretty much stuck in its ability to lower the Grizzly bevel angle. I'm not sure the Broadhead sharpener angle, but I think it is closer to the factory Grizzly angle. If you took a modified Grizzly that was around 22.5 to 25degrees on the bevel, I do not think that the Broadhead sharpener would match that bevel. On the other hand, you can change the angle on the knife sharpener.
I'll defer to Ron, but I'm of the opinion that the knife sharpener cannot match a completely flat 25degree bevel on a Grizzly. When I set the bevel on a Grizzly at 25degrees with a file, it is 25degrees flat along the entire length. If I then took that Grizzly and stick it in the knife sharpener and adjust it to match the same angle, it will only match in the middle. The stone and rod swings on an arc from a pivot point whereas the blade is flat and straight. I think it is impossible to have the arc of the stone to match the same flat straight bevel cut by the file. Flip side, if I set the bevel with the Knife sharpener and then run the bevel over a flat file it will show high and low spots.
I normally set the bevel by hand using the Ashby file. I've also tested an alternative low cost file of which I posted a review and tutorial on LW. Once the bevel is set, I develop an edge using mill files. I recently began going the extra step of honing this edge to a final finish with Ron's knife sharpener, but I do this by freehand holding the stones in the carrier. Ron sent me a bunch of his finished Grizzlies and they turned out near identical in weight as mine. They are sharp enough to cut you if you look at them too long(both his and mine)
I would recommend that anyone who is not rock solid in their ability to hand sharpen hard steel to consider keeping the angle close to the factory 30degrees for starters. This would require the least amount of steel removal. This will not match the edge of a modified Grizzly, but you'd get a great edge. Ask Ron which sharpener he thinks would best serve that purpose. The other option is to follow the elk man's advice above and have your Grizzly broadheads sent to Ron. Ron will lower the bevel and send you back a Grizzly as sharp as it gets. From that point you'd only need to match his bevel to maintain the edge, which is not that difficult.
In the end, "Grizzly" needs to get off of their butt and get the angles set closer to Ashby straight out of the pack. If they do not, people will dump them in favor of the Abowyer Brown Bear, or the soon to be released STOS Ashby. I've shot Grizzlies for nearly as long as they've been made, and continue to use them because they work well. BUT, as good as I am at sharpening them, they can be a pain at times:)
later,
Daddy Bear