No, a heavier bullet necessitates a reduction in charge to keep the pressure the same as the lighter bullet.
The proper load data is avalible on the Hogdon powder website: http://www.hodgdonreloading.com/data/rifle
Select "22 hornet", then "40 grains" then "lil gun".
[CODE]BULLET WEIGHT40 GR. SPR SP
Starting Loads
Maximum Loads
Manufacturer
Powder
Bullet Diam.C.O.L.
Grs.
Vel. (ft/s)
Pressure
Grs.
Vel. (ft/s)
Pressure
Hodgdon
CFE BLK
.224"1.725"
12.1
2,484
23,200 PSI
13.5C
2,684
28,400 PSI
Hodgdon
H4198
.224"1.725"
10.5
2,253
26,100 CUP
11.5C
2,488
32,800 CUP
Hodgdon
H4227
.224"1.725"
9.0
2,421
39,900 CUP
10.2
2,567
43,000 CUP
Hodgdon
H110
.224"1.725"
10.0
2,569
32,400 CUP
11.2
2,795
41,800 CUP
Hodgdon
Lil'Gun
.224"1.725"
12.0
2,667
24,900 CUP
13.0
2,826
28,400 CUP
[/CODE]