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OAL/CBTO experiences with Hornady 178gr BTHP or Nosler 175BTHPs?

Hoping to get some feedback/experience from the collective on these two bullets.
Rifle is an AAC-SD 20" 1:10 twist, BC stock...I have a solid 175gr SMK load I worked up via OCW, but got a good deal on both of the above.

I didn't play w/OAL/CBTO working up my goto SMK load, so thought I'd start longer (but still AI mag length) with these and the long R700 throat.

I've seen more than a few saying they interchange loads across the 3, but the H178 BTHP is significantly longer while the Bowlers seem to have a more forward ogive. As a 'compromise,' I did a 'mini' OCW +/- 3/4 grain in .2gr increments vs my goto, expecting at least some degree of success.

No pressure signs, but more like 2-3" groups vs my goto, not a node in sight.
Am I wasting my time in loading these longer, or just haven't found the node yet? I'm not chasing the last 1/10th MOA here, but certainly expecting sub MOA on both..

Any experience on jump/OAL on these?
For reference, I'm using match prepped LC brass, Wolf primers, with my goto SMK load at 46.2gr of PP2000MR, 2.815" OAL..
 
No one using the Nolser 175 BTHP pr Hornady 178gr BTHP running at (AI) mag length?

From what I've been able to find, seems like I should be fine jumping/loading to mag length on the Nosler CCs, but not so sure on the H178BTHPs.

Anyone?
 

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