If you want versatile try the 7mm-08, 78gn bullets at 3400fps up to 180gn bullets at 2500fps
I don't shoot at night, but the only time you need flat-shooting is at night or at very long distances, when it's difficult to judge or lase distances, or the bullet is coming down so steep that estimating the range 5m short or long means a 5m high or low miss. Are you able to range distances at night? The short fat lighter bullets have BC not much better than .22LR cast bullets, so trajectory at similar velocities are not much different. A 100m zero with a 40gn VMax in the .223 at 1080fps will still be about 120mm high at 55m and 120mm low at 125m. By 150m it'll be about 450mm low. But it's also close enough that you can get plenty of practice with .22LR to learn the holdovers.
If quiet is your goal then you want the lightest possible powder charges, pushing the lightest possible bullets. Heavier bullets require more powder to make the same velocity, and more powder means more bang. Trailboss is king in this respect as the low density means 10gn completely fills the case. AR2206H is also excellent for reduced loads. Pistol/shotshell powders are also good choices, but the tiny charges leave a lot of empty case which can degrade accuracy. The sonic crack is a large part of the report though, so even a 220gn subsonic bullet is significantly quieter than a 40gn bullet at 1200fps, especially to other people further away from your position.
But even a 30gn bullet at 1080fps has enough trajectory curve to require accurate range finding.
I've found that it's not really necessary to go all the way down to subsonic to be significantly quieter than factory ammo, especially with light bullets. A 32gn .204 bullet at 2400fps is very easy on my ears, as is a 55gn .243 at 2000fps. 1500-1700fps is a nice hearing-easy velocity for the heavier 150-200gn bullets. Personally, I would consider the sound barrier to be a "soft" limit and concentrate more on load development for accuracy than noise.
Trailboss comes in 1.5kg but it comes in the big 4kg bottles the "normal" powders come in. Price is around $140 but I don't know what availability is like currently, ask your dealer to order you some. TB is also good in virtually all cartridges, particularly the bigger revolver cartridges, like .38 Special, .357Mag, .44Mag and .45 Colt, and milsurp rifles - 6.5x55mm, .303, .7.62x54R, .30-06 and 8x57mm.
If you are shooting the brain/cervical spine, it really doesn't matter what bullet you use. I suggest finding a cheap readily-available bulk bullet though, like the 55gn SuperRoo, or the lighter VMax's, I like the Speer Hot-Cors in the larger calibers. Very few bullets will deform at subsonic velocities, but if you work on around 1600fps terminal velocity, most varmint-style bullets will still function, below that in smaller calibers (bullet diameter) consider everything to be an FMJ, and aim accordingly. Once you're up around .350"/9mm bullet diameter, a large flat metplated soft-lead cast or jacketed SP/HP bullet will still deform down close to subsonic velocities, if placed correctly.
It's a shame you aren't a lot closer, you could come and hear them for yourself.
Tubs wrote:Yes, that is where I am at. I like the idea of being able to hunt without making too much noise, and ideally with a rifle that can do a bit of everything.... I have a Hatsan Escort 22 (CZ copy) which is accurate enough (1.5cm group at 50) but the scope that came with it wont work with my PARD 007.
Im about to pick up a Marlin 357 lever for some plinking fun but I wont be scoping it so it wont be a nightime gun for hunting.
My hunting gun of choice is a 223 Tikka Lite left handed - the Athlon Scope works very well with the Pard. . Ill be doing plenty of shooting with factory ammo but it will be fun to experiment with different variations of projectiles and powder, especially if I can shoot quietly, which is the main objective.
If Trailboss powder is the way to do it I will buy some. Is it widely available?
What's a good multi purpose projectile? Happy with 40 grains up to 55... Not sure if it makes a difference if Im trying to head shoot everything.
Thanks!