John Boy,
Some suggestions,

1. Don't go to 40/1, it may be to soft, Try 24 - 30/1.

2. I wouldn't crimp at all.

3. If you want the bullet to engrave better, make a longer case. You don't have to be tied to the 46mm length. Your camber will most likely take a case as long as 1.94, before the throat starts. That how long that I make mine but, I BS. With the stop ring, you can push it into the rifling that way. Keep the mouth square with little or no chamfer.

5. try Rem 2 1/2 Pistol primers with the 4759.

6. Speed it up, go to 14.5 4759, your in the trans sonic range. I think you'll do better at 1300 - 1400.

Frank

Frank, went to the basement thinking about your recommendation to make the cases longer.  That's a project, reforming 30-30's, trimming and then reducing the rim diameter.  So, dropped a bullet in the chamber and took some measurements.  With the bullet seated at the bottom of one band behind the stop ring, the round COL is 2.495.  When chambered the ogive is engraved in the leading bore cut half way down the ogive with very little camming needed ... Bingo!    No crimp will be applied to the case

Next:  I have no idea or reference what the brisance of a Rem 2 1/2 primer is.  What I do know though is the Fed GM150M has the lowest brisance of all  the pistol primers.  So, GM150M's it will be with the SR4795.  The powder is an extruded single base with a heavily textured surface kind of like brushed aluminum to improve ignition.  As with BP that has a graphite surface, low brisance primers work best to ignite the powder column.

Next:  All the reading I've done including Philip Sharpe's Guide, the charges are either 13.0 or 13.5gr of SR4759

Next: About the alloy.  I've got 1:40's cast and have to give them a ride.  If no clover leafs with this alloy - next batch of lead will be 1:30

As for the the 300MP reloads, I am going to increase the charge to 13.5gr and load them the same way as the 4795's except using CCI BR2's instead of the Federal Match Magnums.  Seating the bullet out should reduce the blow back

I've got 8 days to fiddle with the Aydt before the match on the 19th.  Really believe seating the bullet out is going to improve the groups

JL, for the good of the order ... Federal GM215M primers are what I have been using with the 300-MP reloads.  Also am putting a thin construction paper wad over the flash hole so none of the very fine grains get in the hole to disrupt the powder charge ignition

John Boy,
I'm glad your having success! 

I see what looks like several tipped bullet holes, hopefully that will go away with the increased powder charge. If you can manage a breech seater, I think you'll be very happy with that Hudson bullet. I've gotten 5/8's groups (5 shot @ 100) with mine that way. If you still have a problem with tipping after the 14.5 loads, give it a try. 

I've never shot mine at 200 for groups so, I can't say what it will do at that range. I just use it as a OH rifle and sight it in at 200. I'll have to try it out before long though, to see what it will do.

Frank

To the range again today - 200yds only
*Rem2 1/2
BACO 320180 Stop Ring - 181gr actual - 1:30
10 rnds - 14.0gr SR4759 ... Green patches on target
10 rnds - 14.5gr SR4759 ... Red patches on target
I'm getting there but not happy with the results
14.5gr - red patches - well, not match grade results
1 - Center
2 - Ten Ring
3 - Nine Ring
1 - Seven Ring

14.0gr -green patches - not bad but more work needed
Only 9 rnds on the taget - clueless about the missing
4 - Center
3 - Ten Ring
2 - Nine Ring
1 - Unknown

Using an old target and sight setting for 13.5gr SR4759 for 14.5gr group, moved sights just enough to not bugger up 14.5gr holes for 14.0gr

(You need to Login or Register to view media files and links)

Next .... back to 13.5gr and 13.8gr SR4759 with 320180 bullet.  Gonna try a 265gr bullet with 13.0gr SR

John - found a container of Ideal 319289's under the counter that I forgot about.  Another Doc Hudson straight taper bullet (185gr) that I'm going to give a try also.  As you can see it has plenty of bearing surface and one of these bullets HAS to produce because I am running out of patience!
(You need to Login or Register to view media files and links)

John Boy,
Don't forget to try 4227 with pistol or rifle primers.

Frank