Chronos wrote:The OP is asking about .223 ammo, not .22lr ammo
hiyoh wrote:Ah I see.
I missed the two lines with AS30N and Trail Bosss in the ADI list.
Max 3.2gr of the AS30N for 1060FPS and 4gr for the Trail Boss like Chronos said both keep you sub sonic.
The only two loads in all that list though.
Not a popular activity the subsonic 223 I guess.
Chronos wrote:but boy, you'd need to know your bullet drop
Chronos wrote:Not sure if you're serious
The OP is asking about .223 ammo, not .22lr ammo
Chronos
1290 wrote:I did get that part.... he wants a 0.22 Calibre projectile at subsonic velocity.
If the projectile is shot from a rimfire or centrefire whats the difference?
you can buy subsonic rimfire rounds off the shelf, is my point.
Not as cool shooting them out of a rimfire I guess.
Chronos wrote:but boy, you'd need to know your bullet drop
Chronos wrote:Sorry 1290, missed that the first time but I see what you were saying.
My mate recently saw the light too and traded his .22mag for a .22lr. Almost half the noise and just as effective at the ranges he is shooting rabbits at.
Another mate loads cast bullets for his .308 as his fox load. Why? I don't know, he has several .22lr and .223 rifles. Lol
It's a funny world isn't it.
Ariat wrote:Put it into a ballistics calculator just for fun.
Zeroed at 100... about 45" drop at 200m and 154" drop at 300m...
At 500m it's about 660" drop
1290 wrote:300AAC is funny enough, then they go for the 223AAC too!
Blackened wrote:Next is .17AAC.
You put a few drop of coke in your barrel and drop down 1/8th of a Mentos.
1290 wrote:Chronos wrote:Sorry 1290, missed that the first time but I see what you were saying.
My mate recently saw the light too and traded his .22mag for a .22lr. Almost half the noise and just as effective at the ranges he is shooting rabbits at.
Another mate loads cast bullets for his .308 as his fox load. Why? I don't know, he has several .22lr and .223 rifles. Lol
It's a funny world isn't it.
It certainly is funny, I think aussie shooters going for the 300AAC is funny enough, then they go for the 223AAC too!!!
The 310 Cadet was/is apparently too gay for these guys who then want to load down a high vel 0.30 cal centrefire to pedestrian velocities as well a 3000fps centrfire 0.22 to rimfire sub velocities... I scratch my head....but if thats what you wants... go for it.
meawls wrote:I’ve just lately started dabbling in this area ... simply because it’s fun... and there’s not much info out there - frustrating. Happy to share results so far FWIW ... For those interested, 20 clicks upwards from a “normal” 100M zero on a scope with 1/4” increments will get you on paper. All loads with Federal match primers,and 5gns trailboss ... didn’t want to go much lower because it would leave quite an airspace in the cases, which by all accounts leads to increased deviation in velocities, which by all accounts leads to less accuracy. All were groups of 3 fired at 100 metres ... Remington 700 with 1:12 Twist: Barnes grenades 30gn: V=1729-56 FPS, 3.38” (including 2 into 0.532”); Sierra SP 40gn: V = 1430-37 (outstanding deviation!), 1.134”; Tikka FMJ 50gn: V = 1352-83, 0.500” (yep ... that’s 1/2 MOA! ... Despite the deviation). Mossberg with 1:9 Twist: Barnes: V = 1607-1728 (shocking deviation!) 2.99”; Sierra: V = 1393-1453, 2.81”; Tikka: V = 1336-94, 1.375”.
Early lessons ... I regard speed of sound at around 1080, but it’s variable dependant upon conditions ... several ballistic calculators will calculate this for you after the parameters are entered. Each of these loads easily exceed the speed of sound ... by boy-ohhh-boy were they fun to fire, especially in that massive VSSF! And how about exactly 1/2” at 100M ...?! Wouldn’t need to expand at all for easy day-long headshots. I was unsure whether these loads would stabilise in the 1:12 barrel ... but they sure did. I’ve loaded up identical loads for each rifle using 62gn Nosler Varmaggedons, and these should be much closer to the sound barrier .. not to mention point of inability to stabilise in THAT barrel. I’ll get back to you on these when I get opportunity to test.
I also plan to substitute the BR primers for magnums once I’ve found a load that sits just below the barrier ... by all accounts these tend to result in less velocity deviation ... will get back to you on this too.
meawls wrote:That’s exactly what these loads were ... simply to establish ballpark, and shared for the community due to their being not much else out there ... No point in batching up lots of loads if they ain’t where I need em to be !! I’ll be letting you know when things really start to rock and roll.
Can anybody verify or refute whether lots of airspace in a TB load = lots of velocity deviation .... all else being equal ... or is this hearsay/furphy??
SCJ429 wrote:Four grain of Trailboss in your 223 case should be about 70% of the case filled depending how deep you seat the pill.
SCJ429 wrote:Thanks Blade, four grains is less than half then. I remember starting at four grains which was subsonic and could be shot without hearing protection. Groups were not great at 50 metres.
meawls wrote:I wouldn't hang my hat on the results of three-shot "groups" either, but they're okay to get ballpark velocities so you know how close to subsonic you are.