Marsh,
I consider weighing bullets to be very important. When weighing them I have found bullets that are visualy perfect but weigh one or two grains light.  Remember, if a bullet is light, it has a hole in it somewhere and that hole isn't going to be on center.

When I weigh my bullets I place them in colums, each colum being a specific weight, i.e. 184.6grs. I can then see the weight distribution I'm getting. I use the heaviest two or three colums for bench shooting and the next three or four for offhand. I save a few of the others for fouling shots.

If you're wondering if this is important or not, try sorting a batch and shoot a group with the heavy ones and then a group with the lighter ones. you should see the group open up with the light bullets.

These are my opinions and as the esteemed green one says,YMMV

Steve Durren

I shoot 40-65 and 45-70 and I weigh every bullet before loading. Putting the bullets in rows to see distribution is the way to go. I discard the lowest 2 rows and remelt them. Getting a many variables out of the way will tell you what you need to alter to reduce your groups.

Marsh if you want to shoot 250's or finish in the top three, especially in bench shooting weighing bullets is a must! 

Most will tell you that bullets within .2 tenths is good enough but I sort and shoot by exact weight. Keep in mind it is the little  "big" things that wins matches. 

Marsh if you drop one or two points anymore you are not even in the game!

I read in a Sierra add that they keep there Match King bullets to +- 3/10 of a grain. There regular bullets to +- 1/2 grain.
I would think most of there bullets a closer to ideal weight, but that's the spread they use.
Marsh I weigh my bullets and keep +- 2/10 grain
Don

MP
Nice target, what velocity in your rifle is the 13.5 gr of 4227 giving.
Bob

MP,

  I haven't found that the new lots of IMR4227 are erratic, just that the MV you get for the same wgt./vol. will be different than from another one. It was always my opinion that the manufacturers blended the powder that was sold to the public so that the approx. same pressures/velocities could be had. Maybe they still do but are spreading out what they feel is exceptable. In any event I'd recommend testing a new lot and adjust as necessary. For me this is no big deal since it's SOP with BP.

  On your AA#9 results. Mighty impressive!!! I'm currently using it in the .22 Hornet Spitzer tests with some impressive SD's and MV's. My only problem with it is that it doesn't work all that well in my 8.15 x 46R. It has a slightly rough bore and with AA#9 when the fouling builds up you can't hit the offhand target paper at 200 yds. The frustrating part is that it'll shoot great, but when it goes south you have to stop and clean it out. The other frustrating point is that this break over point can happen at any time. I've had it happen in as few as 10 shots and as many as 48. I don't have this problem with IMR 4227, but it also doesn't shoot as well as the AA#9.

PETE

MP 
Both the IMR and Hodgon 4227 anr now made by Hodgon.when I talked to the Hodgon people at the NRA Convention this spring they told me that they would continue to produce both variations. Good news for me as I like the IMR better.

40 Rod