No. 4 Rifle; Zeroing Instructions Data Inconsistency?

[CINDERS]

All the bets are off using the MKVII data simply because of A) Powder burn rates and more importantly the higher BC projectiles I've faffed around with this no end using MKVII data and trying to emulate the trajectory mid flight of SMK's (Velocity Rates V's Trajectory)to get the hit at the desired range.

I can tell you I used Litz's program, Load Data program with lots of shooting which led me to the conclusion that I just settled on a load that pretty much matched the 2440FPS of MKVII rounds and then shot the ranges we do in all types of weather to get the DOPE.
You'll find the correlation when using high BC projies like the SMK your having to dial in @50+ yards (They fly flatter than MKVII's) more onto the elevation to get a hit but the better catch here is wind drift is not as pronounced with the new projectiles.
I've lucked onto 400 Highland 174's these I have been told emulate pretty much the MKVII flight characteristics Sellier & Bellot use them in factory loadings AFAIK.
Along with 1500 SMK's, I also luckily have 500 TAIPAN .312" FBHP's which are a very rare, seeing as Malcolm Bone has probably passed on & the new owner gave it away after break in's & theft's.

So the best thing is to try and get your new projectiles your going to have to do the range time like we all did, in fact 3 weeks ago I watched one of our shooters off a bench at 500M using old MKVII ammo out of a scoped No.4 (Not a T) with the shots going in the general vicinity of the bull!
So my load I settled on after the adventure was 46 Gns of AR-2209 (H414-H4350, IMR 4350) Fed - Match primer, AMP annealed RP case, I set the 174 Gn SMK to the COAL of a POF 1967 MKVII round using the Ogive may had had the round to long for the mag. (No responsibility with others using this load data)
I have won comps with this load most notable one was the 2016 invitational to the SASR range at Swanbourne multi positions over 300-200-100 yards against 40 other shooters I also won the 600 yard shoot with my 308 APRS as well on a Fig.11 against the same amount of shooters.
Shot a perfect 10 round 50 points however it was a very hot day we walked everywhere I neglected to manage my water & electrolytes properly and stuffed up with heat stress on the last match for possible a triple win!

So the good thing here is you are going to do lotsa shooting.