Here are pics of the shooting with my 40-65 HiWall, 16 twist with my 370 gr Elliptical Minigroove bullet cut for me by Steve Brooks.
The one was shooting a long range match.  800yds.
Group only a bit over a minute of elevation 
The other one was a 100 yds 5 shot group.  (pulled one
slightly to 1:00.
Velocity of the load is 1373fps.   

Here is my DDEPP 40 cal  dual diameter paper patched bullet designed for 16 twist 40-65 --100yds group.
Bullets/clocking 1400fps over 75 gr Swiss 1.5 are stabile to 1K yds 
and the rest of my 40 cal bullets for 40-72-12 twist on left and 40-65 16 twist on right.

Oh, note my 2004 "pre-money money bullet" 4th from right
for my 12 twist 40-72.
1.54" long and 460 gr.-- "before graduating to PP bullets"

MickB,
Especially considering your eye issue,
Lighter bullets will have less recoil...
My 370 gr bullets,tho cranking 1400fps are a 
"pussycat" to shoot.
beltfed/arnie

MickB
As you can see by my photos,
My bullets, the 370 gr Elliptical Minigroove and
the DDEPP are profiled/"tapered" such that they can be seated out with only about 0.100" into the case. The front
part of the bullet bodies are at Land dia, so will slip up into the bore for great concentricity.
So, I can easily get 75 gr of Swiss 1.5 into
my formed/ fire formed WW cases (from 45-70). I use a 0.060" LDPE wad over the powder, with only about 0.050"
compression.  They clock 1400fps over my Oehler Chronograph. And my relatively low come ups for the longer
ranges essentially verify the muzzle velocities.
The other "half" of the story is that my bullets are only 1.325" long, so they are stabile out to 1K from my 16 twist 40-65. The usual +- 400 gr 40 cal bullets are close to 1.4"
long and do not stabilize out to long range in 16 twist.
beltfed/arnie

Arnie
I had a seniors moment and missed the bit in your post about the 75 gr of Swiss hence my question regarding how you got 1,400 fps. Perish the thought, but for a moment I thought you may have used smokeless powder, I'm ashamed that such an awful thought could have even come into my head concerning a person of you character.
The new bullet I have ordered from BACo is slightly shorter at 1.370" than either the 400gr and 420gr Money bullets I have so it should work OK in the 16 twist. We shall see.
Mike.

Joe,
How long are each of those Ron Long bullets?
tx
beltfed/arnie

Old Win.
My work with the lighter bullets in my 40-65 is to 
have the best stability and accuracy at all ranges.
Not Just to shoot to 1 K, tho that was indeed one of
my goals. Look at the combo of my grouping at 100yds,
and my grouping ( when I was a better shooter, better eyes,etc) at out to long range. Notwithstanding floaters-etc,
this year, I placed 3rd BR in the Eau Claire (200yds) BPCR
Iron sight Schuetzen match
In Mike B case, he mentions shooting 100,200 yds.
And, seems to me reduced recoil would be nice for him, too.
The lighter bullets are accurate in the 40-65 16 twist, as well
as a "pussycat" to shoot.
beltfed/arnie