Sir Jerry,
You better be wining and dining Her Ladyship as often as possible if she is inclined toward Africa.
I bet she shoots like Annie Oakley with that .303 British Rodda RB DR too.
Long live the Queen !

Here is the velocity check on your ammo (and a few other bullets) in a 24" factory Ruger No. 1 barrel.
83.0 grains of AA-2460 with all bullets.
Will chronograph 5 shots of each and some 500-gr DGS Hornady Superformance factory ammo as a control, and as the fouler.

[Linked Image]

Notice I changed the Woodleigh 480-gr HYDRO to 3.58" COL instead of 3.56".
Makes a nicer staircase of COLs.
The 480-gr DGX Bonded is a 100% LR with droptube filling, not compressed at 3.56" COL, 83.0 grains of AA-2460.
All the other loads with same charge are compressed after droptube filling.
All are crimped tight, locked in place until fired.

The 450-gr TSX with longest seating depth of 0.450" is most compressed,
and it should be seated gradually with several runs in and out of the seater die,
pushing the bullet down in steps so as to avoid bulging the case below the bullet.
The AA-2460 being all perfect little spherical grains can take to compression well.
Might even end up looking like AA-2230 with enough compression to flatten some of those perfect little spheres.

Ron aka "Rip" for Riflecrank Internationale Permanente
NRA Life Benefactor and Beneficiary
.458 Winchester Magnum, Magnanimous in Victory
THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.