Probably beaten to death by now.....
This is a hunting rifle Remington 700 WM. and I shoot no more than 500yrds.
any input appreciated.
At distances less than 500yds, and especially less than 400yds, the advantages of shooting the 200+gr high BC bullets become much less significant. The two primary advantages of the Berger 215gr .308 bullet is that they are proving to be a very accurate bullet, and they have a high BC value. Both of these features make it easier to hit an animal at long ranges, and the high BC value also helps maximize the energy (velocity) of these bullets at long ranges. So the first aspect is can you hit the game animal you're shooting at, and will the bullet you're shooting have sufficient accuracy and remaining energy at those ranges to be effective in dispatching the game animal. And at the longer ranges, well past 500yds, the 215gr Berger and similar high BC bullets have the advantages in this regard. But little to no meaningful advantage at less than 500yds.
The second aspect of bullet performance is its terminal performance upon impact with the game animal. At your distance limit of 500yds and less, I don't think you'll experience any consistent advantage using the heavier, higher BC bullets compared to the bullets you've been using - which in all likelihood, have already been performing well in killing the game they hit at those distances.
So my take on this issue would depend on your answer to this question. What benefit are you seeking in switching bullets at this time? If you're looking for better accuracy, you may find a very slight improvement in testing some of the high BC bullets in your rilfe. However, with your sporter weight rifle, you'll experience more recoil. If your factory rifle isn't equipped with a muzzle brake, you'll probably want to proceed with the installation of a muzzle brake to tame the additional recoil from these heavier bullets, compared to the lighter recoil from the bullets you're currently shooting.
If you're looking to improve terminal bullet performance, because you're currently dissatisfied with the performance of the bullets you're currently using, then I think you'll find no consistent advantage at less than 500yds. And under some shot profiles, you may experience more meat damage and less desirable bullet performance than with the two bullets you're currently using.
You've requested advice on bullet selection on a Long Range Hunting forum, and the majority of the responses may be geared toward long range distances, which most define as distances greater than 500 yds. If the bullets you've been shooting have been performing well for you, and they don't cost as much as the heavier, higher BC bullets, I don't see any compelling reason to change.
But if you like to shoot and reload, as many do, I wouldn't dismiss the opportunity to see if the heavier bullets shoot well from your rifle. And should you choose to prepare for and take shots at game at longer ranges, you'll have a bullet and load worked up that will be better suited for that purpose.