Hallo Bootsie.
To 1:
When i read in my book: The Historic Henry Rifle.....by Wiley Sword, i found this:
...On Nov.25,1862 Oliver Winchester admitted they made a mistake in not developing a stronger cartridge.The use of a longer cartridge with more powder and hence more penetration had long been considered.Yet it would reducedthe capacity of the magazine to about 13 or 14 cartridges versus the present 15, and would have added length and weight to the frame.
In No. 1862 O.Winchester had requested Smith & Wesson,the Volcanic's old partner, to supply 100 special .44 cal. cartridges,which were longer and fitted with larger bullet.
On June 12,1863 O.W. wrote to Commissioners Joel Hayden,Col.Will.R.Lee amd Col.J.Kurtz about his proposal to make a cavalry model ( short barrel),or a picket-size and a sentry-size Henry(longer barrel).Winchester stated he would even be willing to make a cal.50 Henry with a 30-inch barrel.
On Nov.27,1863 O.Winchester offered a formal proposal to Asst.SecretaryWatson:
1. 40,000 Henry carabines made at Colt's for $26
2. 20,000 Henry carabines made at Colt's for $27
3. 10,000 Henry carabines made at Bridgeport for $28
All carabines would be of the usual cavalry length barrel and would carry a longer .44 cartridge( case 1 3/5 inches) with 30 grains of powder.
On Aug. 26,1864 Lieutenant Stockton tested a Henry carabine,using a .44 cartridge containing 36 grains powder and a ball weighing 324 grains.
So that's all i know.Oh by the way.I have two of these books, so......
To 2:
In my Henry Lincoln i can load 13+1 in cal. 44-40.
Uberti said 12+1