Thread: Tikka .270 what to do?

Originally Posted by Huntfisheat

"You wont gain anything by going 7mm08 as a decent load in that recoils about same as 270 especially if you end up shooting 150gr plus bullets, i used to have a 7mmo8 as well."

You mean apart from 25% less measurable recoil?
https://i.pinimg.com/originals/e6/f1...08cfb78016.jpg

nothing in your link about 7mm08 with 150gr plus bullets.
and a did say a decent load, not poofter factory ammo

Originally Posted by NewbieZAR

Essentially all it is, once you have fond your load, then what you do is.

Load up 15 rounds (9 can work too)

then break them up into 3 groups, and then you go to the range and chrony them across a range of temperatures that represent the temperatures you shoot in.

Say for instance you hunt in weather from -5 Degrees right up to 30degrees celcius.
then you take 1 lot and keep it on ice in the chilly bin, shoot them across the crony straight out the chilly bin while measuring the temperature of each round before you fire them and record this velocity against the temperature.

then you take the 2nd lot and d the same at around 15 degrees celcius, leaving them in the shade on a warm day should get you close

and then the 3rd lot you do hot, at close to 30 degrees celcius, you can leave them in the sun to heat up for an hour or so

once you have all these velocity vs temperature readings then you work out on average how many fps per degrees Celsius or Fahrenheit depending on what you use. once you know the variance per degree then you plug that into your ballistic calculator (most good ones have a field for this) and then you are done. provided you plug in your temperature that your base speed was measured at in and your temperature when you calculate a shot you should be sweet.

you can get away without it but your trajectory will change with temperature as that powder burns hotter and colder depending on temperature. ADI Powders aren't affected by temp enough to worry about

be sure to do it all with a cold fouled barrel

Originally Posted by NewbieZAR

be sure to do it all with a cold fouled barrel

thanks