Reload - 270 WSM

[kiwi shoot]

Hi all those Reloaders

I need feedback on reloading relative to 270 WSM.
I have a weatherby vanguard 270wsm and want to reload as accurate as I can.
I have RCBS dies, using:
Hordany SST projectiles 140 grain
AR2217 ADI powder

I have tried loadings of 66 grain to 70 grain compressed.

I compared these to those produced by federal 140grain ballistic tips.

I have taken these to the range and found that the reloads hit the target about 1.5" lower.
Does anyone have an idea why there is such a difference???
Why would this be lower does that mean the factory produced shoots straighter???

Thanks heaps in advance.

[PaJack]

I got the best accuracy with 130gr. Hornady SST'sand ReLoader 19 powder...

[mello_collins]

Don't worry about where it hits the paper, worry about group size. If the groups are small then that is your load and adjust your scope to it.

[kiwi shoot]

Thanks for that. I'll work on that basis.