There are basically two styles of bipods, the "classic" Harris-style, and bipods that use ski-feet. The shooting styles used with each are quite different. With a Harris-style bipod, the [rubber] feet are pre-loaded to help prevent hop, and some type of squeezable (bean bag) type rear bag is used to adjust elevation. The ski-type bipods common among F-TR shooters are typically used with a sand-filled eared rear bag. As the styles of shooting used with each type differ, so do the special considerations necessary to obtain the best precision. The primary consideration with a pre-loaded bipod is that the same pressure be applied every time, or increased vertical dispersion will be the result. The primary consideration with ski-type bipods is that they track straight back during the recoil impulse. Otherwise, increased horizontal dispersion will be the result.
Being one that prefers to pre-load a bipod, I favor the Long Range Accuracy F-Class bipod. It has a footprint that is half again as wide as the Harris or standard Atlas bipods, meaning that it helps oppose rifle torque better. Bill, you mentioned you might be looking at a heavier bipod. If that is still you intention, have a look at the LRA bipods (
https://www.eurooptic.com/longrange-accuracy.aspx). Just be aware that they are much larger and heavier than a Harris-type bipod. If the extra size and weight are an issue for they type of shooting you intend to do most often, they may not be your best choice. However, if you wish to pre-load the bipod and are looking for the greatest stability possible (i.e. light weight and mobility are less critical), the LRA might be the ticket for you. One other thing, they're a bit pricey compared to smaller classic bipods such as the Harris/Atlas.