Thread: 270 loads

Originally Posted by LJPRMC

evening ,
I am going to use a borrowed rifle for a while .A 270 win sako . SO i am going to build a load for it ...
I have 2209 , 2208 , R19 , 2206H and some N160 .
I got hundred Hornady 130 sst , REM primers, CCI , and fiocci primers as well .

Now the 270 calibre is not really my turf ( more a 7mm-08 sorta guy ) but i got enough gear and a labrader chrono to get into a fair bit of trouble .
So what are people thinking ?
I dont get anything closer than 200 mts and have to shoot out to 400 mts too often as well .
and FYI , I got GRT as well (and i use it ) but im not really wanting to put 150 bucks down range looking for a sweet spot in a calibre / load that i not really familar with . SO , i,d appreciate some help with a good realiable load using what i got. Some place to start .............
thanks
les

Greetings @LJPRMC,
The go to powder for the .270 was IMR4350 (similar to AR2209) prior to the appearance of 4831 (now H4831 or AR2213SC) and was IMR4064 (similar to Varget or AR2208) prior to WW2. Rather than suggesting loads, I don't load for the .270, you could use my go to method. I first chronograph the start load to compare with the Hodgdons data. You need to adjust the book velocity for your barrel length. This lets me check if my powder lot, projectile, rifle combination is giving similar results. Next work up in steps of a grain chronographing along the way until you get close to your target velocity of say 3,000 fps or a little less if your barrel is shorter than standard. This should take no more than 10 rounds and your last load will likely be accurate. You can fiddle around with the load from here if you want too. A word of warning about AR2209. The Hodgdons/ ADI data for the 130 grain Hornady is in CUP which suggests that this is for the older and slower version of AR2209. You may find your velocities higher than the book would suggest.
I long ago gave up the slavish working up from start loads in tiny steps and looking for pressure signs that some tend to delight in. Most, if not all, of the pressure guessing techniques suggested have been debunked as practically worthless and velocity from good pressure tested data has emerged as the best guide to pressure for the average handloader.
Regards and all the best for your load developement Grandpamac.