With a military Swede, especially if it is a M94 and not a M96, you have to keep your loads within the pressures of the service round. The materials of the era were fine with service pressures, but they are not fine when exceeding service pressures.
Modern rifles, made of modern alloy steel, there is no reason why pressures can't equal any other modern cartridge/rifle combination, but these old guns, you are limited by the metallurgy.
That being said, I ran some loads over the chronograph. With a 29 inch barrel the 6.5 X 55 Swede really looks great. Ballistically this ought to beat the stuffing out of a 30-06 with a 150, 168 or 175 grain bullet. Might be getting close with a 190 grain 308 bullet.
My IMR 4350 loads, I think they are close to service pressures, could cut them by a grain.
M1896 Infantry Rifle 29' barrel Carl Gustafs mfgr 1903
17-Aug-06 T = 85 °F
143 gr FMJ 1986 Swedish Ball
Ave Vel = 2610
Std Dev = 14.38
ES = 45.59
High = 2633
Low = 2587
N = 8
M38 Infantry Carbine 24" barrel
28-Oct-94 T ≈ 60 °F
143 gr 1986 Swedish Ball OAL 3.065" 47.4 grs powder average
Ave Vel = 2427
Std Dev = 22
ES = 62
Low = 2395
High = 2457
N = 10
M700 22" Barrel
143 gr Swedish Ball 1986 headstamp
2 Feb 2008 T = 54 °F
Ave Vel = 2470
Std Dev = 18
ES = 48
High = 2491
Low = 2443
N = 5
140 gr Hornday Spire Point 43.0 grs AA4350
R-P new brass CCI-200 OAL 2.990"
2 Feb 2008 T = 52 °F
Ave Vel = 2512
Std Dev = 27
ES = 72
High = 2547
Low = 2475
N = 5
M70 Featherweight 22" Barrel
140 gr Hornady Spire Point 43.0 grs AA4350
R-P new brass CCI-200 OAL 2.990"
18 Nov 2007 T = 75 °F
Ave Vel = 2428
Std Dev = 29
ES = 95
High = 2480
Low = 2385
N = 24
easy bolt life,nice rounded primers