QL or real life load data for N540 and 65gr, 75gr vmax .243 win

[Mattv]

Can anyone run QL for N540 powder with 65gr and 75gr vmax in .243, or does anyone have any real load data for that powder and bullet as data seems a bit thin on the ground and I’d like to know so min and max start points. The only data I’ve got is on the VV app and I find thats always quite high for loads compared to other data.
And before everyone starts saying they use N140 like on my other thread, N540 was all I could get hold of as N140 is non existent at the moment and I need to make some rounds up!

 

[Muir]

You know this, I'm sure, but when makers don't list data for a given powder it's because they recieved sub-optimal results. Why not use 80 grain data, which they do list? Start at the minimum charge and work up. It will probably work great.~Muir

 

[Mattv]

VV have data for 65gr vmax but as I’ve found before, their start data is sometimes near or at the max load listed on other tables, and their max load is a long way above Hornady for example for some powders and calibres. As N540 is a high energy powder I would like to see what other people have found otherwise I will just have to go with VV and work up

 

[Mattv]

For example .223rem with 55g vmax with N133 powder on VV app is start load 21.5grs max load 25grs, Hornady with the same powder and bullets is start load 19.8grs, max load 22.7grs. Quite a difference between the two and is what makes me think VV push their loads quite hot in their data which is why I’m a bit apprehensive on starting with their start load data especially with high energy powder. Normally I take an average between Hornady and VV and start with that but for my above load there isn’t much data available hence my original post.

 

[ashray]

different test barrel and bullet. as always start low and work up

 

[neilst]

The vhit app is often on the hot side but ive never found it unsafe. Keep an eye for pressure signs and stop when you see them (sticky bolt etc etc)

 

[Mattv]

different test barrel and bullet. as always start low and work up

Different test barrels by 1” length, same twist, same bullets 55gr vmax, very different load data as in safe loads. As neilst says the vhit app is on the hot side for loads, and I’ll just have to start low take it easy and check for pressure

 

[25 Sharps]

Different test barrels by 1” length, same twist, same bullets 55gr vmax, very different load data as in safe loads. As neilst says the vhit app is on the hot side for loads, and I’ll just have to start low take it easy and check for pressure

Just start at the lower load and work up same as working with any data