Thread: 243 load research/development

Background: I am a "new" hunter having been bitten hard by the bug 2 years ago. I hunt mostly open tops and sub alpine bush with a Franchi Horizon in 243 and from trial and error have found that Win Deer Season 95g produces reliably consistent results (barring the nut behind the trigger) all the fallow I've taken have been out around the 300m mark with bang flop results. With my preferred ammo being hard to come by locally and with prices continuing to head north I have dived into the rabbit hole of reloading.

My research thus far has revealed the following, Winchester Silvertip delivers more bang than Deer Season but I'm pretty sure it has a boattail whereas the Deer Season has a flat base, more suited to my 1:10 barrel. Hornady's SST seemed to be the semi obvious choice BUT the ballistics say it does not seem to deliver as much punch as the Silvertip running out of velocity and punch at around 300 metres (2211/1035) compared to the silvertip (2185/1007 at 374m)

So my question, finally is this, is there a flat base projectile that will give me similar performance to the silvertip with appropriate load development. (I'm aware of the Nosler BT Silvertip, which is also BT base and used by Winchester in their silvertip factory ammo) My aim is to recreate similar to the Win Silvertip so that on the rare occasion where I may need the 243 to reach out a little further and/or to deliver more knockdown on larger game (Red hinds/stags) closer in.

Side note: I am a rank beginner so some of the above may be incorrect or drawn from incorrect assumptions. I'm not interested in shooting out beyond the distances mentioned, IMO thats not hunting, just target shooting on live targets, getting in "close" is part of the challenge. Also at some point I MAY go up in caliber but for now I want to maximise the 243 whilst honing my shooting/hunting skills especially around consistent accurate shot placement.
Cheers
Pete