Tac powder temp sensitive?

[papaboomboom]

Howdy! Anybody find Tac powder to be temp sensitive? Haven't run into pressure problems(yet) but I notice groups opening up with sun climbing up. Shooting at burro cyn, temp up to 90° with some humidity...just like some opinions, thanks
While we're at it, opinions on weighed vs thrown charges, please

[highpower790]

Typical symptom of ball powder,for that reason I prefer a good stick powder,such as Varget & N140.
In my experiance using ball(w748&blc2) powder, groups open up starting in the 70degree range.

[sghart]

Here's an interesting video for you.

https://www.youtube.com/watch?v=BB-BM_BDVAI

[kcstott]

Originally Posted by papaboomboom

Howdy! Anybody find Tac powder to be temp sensitive? Haven't run into pressure problems(yet) but I notice groups opening up with sun climbing up. Shooting at burro cyn, temp up to 90° with some humidity...just like some opinions, thanks
While we're at it, opinions on weighed vs thrown charges, please

Raton New Mexico when they host a nationals people that shoot there once will figure out a morning load and a afternoon load.

[JagerDog]

Originally Posted by kcstott

Raton New Mexico when they host a nationals people that shoot there once will figure out a morning load and a afternoon load.

Why not just keep your rounds in a cooler?

[kcstott]

Originally Posted by JagerDog

Why not just keep your rounds in a cooler?

You can't have a cooler on the firing line. This is nationals and they play by very strict rules to eliminate any unfair advantage.

At best you can keep it in a cooler in the shade then stage for your relay but as the ammo warms up now you will have a greater temp swing then if you just left it alone and shot your string at ambient. Remember, Nationals are decided by X count. Top level shooters are cleaning the targets and scored by X count. These guys are shooting within 1/2 MOA at 1000 yards. any flicker of a change in the load will show up on the target. Long range is about consistency and controlling the inconsistent.