Thread: 243 load advice 1:10 twist winchester mod 70

just wanted to add. bull tahr 265mtr Berger 87gr vld hunting, shoot was little high. I moved and flicked it 6" high and right so the
bullet went just below the spine with the base coming to rest under the skin. Bullet blow up meet that it chewed up 3 vertebrae and the tops of both lungs. Wanted to go with something heavier but was not happy with accuracy. ran out of time.
End result bullet did it's thing, compensated for my poor placement and the tahr dropped on the spot.

Yup the 40.2gr outcome looks bang on for a reliable hunting load. A little bit of tuning around that powder weight and you'll be good to go. My load of 40.0gr with the same bullet gives 2820 fps from a 20" barrel as you know, and reliable sub MOA field accuracy. This allows me to confidently take upper neck shots from prone if required - taking out the C1 and C2 vertebrae (atlas and axis).

All three of these were taken with that shot placement with the 100gr ProHunter, from memory the fallow @100m, the hind @175m, the stag @220m. I use that shot when I cannot afford the animal running at all with a chest shot, due to terrain. If you zoom in on the fallow and stag photos you can see the blood running from the wounds, the ProHunter obliterates the bone but doesn't make a big mess.

This will do nicely, 40.1grains of 2209 seated just on the lands, every time I tried seating it off the lands the grouping opened up, its not jammed in tight just touching.
Speed was 2840fps
I could probably fluff with it and get it better but for a hunting rifle that won't be shot much past 250yds it's plenty good. If my 270 project comes up good it'll probably do more walking.

Spot on @dannyb. Just goes to show that all rifles are different... perfect velocity for that bullet.

They are pricey, but I got the (90?)gr Nosler Partitions shooting one hole in my mates BSA with 2209

My mate had a factory r700sps for a while im pretty sure they are 1-10 as most factory 243 rifles are
That shot and stabilised and was very accurate with the 105gn amax
It’s worth a go what’s the worst that could happen just don’t shoot them through a can to start incase they do go sideways

A number of us are running similar rifles, but have shortened to 18" although I have another still at factory 22"
We run Sierra 85g HPBT with 2209 at 44.4g getting 3050fps and have been fantastic, I keep a supply with Sierra 100g SBT's, but I recently picked up some 95g Targex and am waiting for my Labradar so I can test them out, but from what I've heard a good little pill.