There are really only two factors that you get to control with factory loads, which is the bullet type & weight. Everything else is out of your hands. If a high BC bullet factory load doesn't shoot as well for you as another bullet, that doesn't mean that you won't be able to "fix" whatever is wrong with it in your reloads.
The Power Shok's are a fine bullet, and much like the Remington Core-Lokt, I'm sure they'll enjoy a stable future just as they have a enjoyed a storied past. It does exactly what it's supposed to do for the average hunter - kill deer at 200yrds or less. Is a Honda a great car? You betcha. Is it the best car out there? Is it the best car for someone that is highly demanding of performance? Eh, not really.
A lot of bullets can be very accurate, especially if you're only asking them to perform at a few hundred yards.
Worrying about specifically looking about secant, hybrid, or tangent ogive bullets will take you down a fruitless path, especially if you're shooting out of factory chambers (i.e. not from a tight throat, specified leade chamber), or from factory barrels. The problem you can get into is that a long ogive tangent bullet might have better ballistic coefficient than a short secant bullet with a wide meplat - as appears to be the case comparing the Power Shok with the Accubond.
Equally, if you have an improper charge weight that's outside of the 'accuracy window' for your load, or you have inconsistent seating depth or inconsistent throat tension or concentricity, OR imperfections in concentricity of your chamber/bore it won't matter if you have a very high BC long secant bullet, because your rounds are going to string all over the place. Or if you have a short bearing surface secant ogive bullet in a long leade chamber, yielding a rather long bullet jump, it's just not likely to be accurate for you (how many guys made that mistake by jumping on the Berger VLD bandwagon with their factory rifles!). In the same situation, a long tangent ogive bullet might be a better choice for you and give much better results, even though its aerodynamics might not be quite as good.
The $20,000 question is this, as it will frame out all of your decisions from the start:
Do you have a particular goal/task in mind?