If you go too say 1400 fps, the trans sonic range can and does play havoc with some bullets where if you are running a slower twist rate it is a regular thing to see stray shots or even keyholes. The one thing to take into account at subsonic velocities is that unless you are running a very slippery VLD like the 208 Amax or ELD X, just about every other bullet has the trajectory of your average 22LR. Most shots are well inside that if I can help it. Both smashed through the shoulders and both stags died on the spot. The longest shots I have taken is a Chital stag at 120 meters with a Lee cast bullet of 150 grains and another with a 185 grain HR cast bullet of the flat nose type. Outside of cast or the TNT, most other bullets are just too hard for heart lung shots but are adequate for head shots.įor 200 meters, you need a good drop chart and quite possibly 208 Amax for reliable kills. There are newer bullets out now like the 190 Hornady specially designed for subsonic use on game. The accuracy of this bullet at subsonic speeds is astonishing with sub half MOA easily achieved. Worked well on both hogs and deer due to the very thin jacket which deforms easily at slower speeds. The one commercial jacketed bullet I did have succes with using Trailboss in the 308 at subsonic speeds was the Speer 125 TNT. The biggest issue is bullet expansion with jacketed bullets and why I eventually went to cast lead for game like Chital stags around various farming properties. Beyond that it is a compressed charge which Trailboss does not respond well to showing up as erratic velocity. A 308 tops out at around 14 grains of TB for 1400 fps with a 150 grain jacketed bullet. The ideal go to velocity is around 1050 fps. With a good 308 and various jacketed bullets it is reasonably easy to get sub MOA groups using Trailboss when going subsonic. Just to confirm, you want average group size, average velocity and standard deviation, with 150 grain hornady interlocks out to 100m?īefore I answer that, can you please tell me what rifle you are using, what barrel length, what twist rate and do you shoot competitively?Īre you intending to do reduced loads or subsonic loads ie. Mind you seems no one is wanting to send eanything west nowadays so at the mercy of the local shops. Not intending to hunt with these loads tho so wil keep an eye out for the Berrys pills. Thanks for the info Blade, gives me hope of achieving a good load for steel & paper. At 2200fps it'll drop about 250mm at 200m with a 100m zero and be down below 1700fps. For a reduced hunting load I'd use AR2206H (H4895) and run the 150gn at about 2200fps at the muzzle. 200m is going to be a stretch against live targets at these velocities. You might not get these to chamber though if you have a tight chamber in the rifle. For hunting try the 300BLK subsonic bullets like the 190gn Sub-X, or use lighter 86gn to 110gn bullets to push the velocity up, or use pistol bullets, like the. I doubt you'll get much more than about 1600fps with 150gn bullets on Trailboss, and I wouldn't expect the SP to deform at that velocity, even at near contact range. 30-06 at about 1700fps - my favourite load for plinking steel without waking up the neighbourhood 311" 123gn Copper-Plated bullet, it shoots very well in my. Trailboss is not a powder of choice for precision shooting Should certainly be more than accurate enough for banging steel and paper, but it will suffer in the wind - at 1600fps it'll have more than double the wind drift of a 2800fps load. With Trailboss you'll find a point where increasing the charge makes very little more velocity, but it's worth trying as it may tighten up the groups. 10.5gn gives me around 1150fps and one-minute accuracy, but it has a sonic crack still. I've pushed it as high as 17.5gn making about 1550fps and 1.5-minutes at 100m. In 7mm-08 I prefer the Speer 145gn Hotcore on Trailboss. 303 and 7.62x54R with very good accuracy. I haven't tried the 150gn Hornady SP in the. 308Win but I use Trailboss in everything, including 7mm-08 and. Obviously every gun is different and what works in yours may not work in mine but interested to hear what results you have achieved with Trailboss in 308W, particularly velocity, SD & group size. Happy to stick to the ADI tables but the one thing they dont give you is any reference to real world accuracy. I am looking at doing some reduced loads for range use only out to 200M and since I already have couple kilos of Trailboss spare and a box of 500 Hornady 150g Interlock Soft Points I am keen to give this a go. Over The Hill wrote:Hello, looking for feedback from those that have used Trailboss in 308W.
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