Hammer bullets estimated BC

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Has anybody else noticed that the Hammer bullets estimated BC is way higher than the actual BC?

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Hi Milkman,

I was doing some research for you and noticed that this question has come up in other shooting communities, and based on what a number of shooters have shared, you’re not alone in noticing this.

In several forum discussions, people have mentioned that the BC values published for Hammer bullets are estimated, and that when they true their ballistic solvers using real chronograph or downrange data, the effective BC they end up using is often lower than the published number. That’s simply what others have reported from their own testing and solver truing.

Some shooters also speculate that this shows up more with monolithic bullets that use driving bands and reduced bearing surface, as those designs may not always line up cleanly with traditional BC models. Again, that’s based on user discussion rather than controlled testing.

The general advice shared in those threads tends to be:

  • Treat published BCs as a starting point

  • Chronograph carefully

  • True your solver at distance rather than relying on the printed BC alone

There are a few long, data-heavy threads on places like Rokslide and LongRangeHunting where people walk through their own results if you want to read how others have approached it.

If you’re comfortable sharing your bullet, velocity, and distance where your solver starts to drift, other members may be able to compare notes with what they’ve seen.

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I have loaded the hammer Hunter bullets in three different rifles and calibers. All of them have been the easiest loaded development and most accurate bullet I probably ever used! Basically, I did a ladder test, found the node then loaded. The problem is when I go out to shoot long range. I already know the feet per second so if the BC was on, I should be right on, but I was always low, for instance my 338 Lapua shot a amazing 500 yard 5 shot group that was 2.2 inches with the 260 grain hammer hunters but was low, it was also low at 1000 yards. The published estimated G7 BC for this bullet is .325 I had to change it to .305 to match. And it was the same with my 300 PRC using the 199 grain hammers and my 7 mm magnum using the 154 grain. This usually puts them the same or under some of the cheaper lead free bullets like Barnes LRX from what I remember and way under something like a Berger bullet. I did kill a nice hog at 690 yards with the 260 grain hammer… it never got out of its bed!

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I’m a big fan of Hammer Bullets - they’ve never failed me over the last 7-8 years of N. American and African hunting. The results are devastating, and I’ve found it very easy to develop my loads in multiple, different calibers. I don’t worry about the published BC too much. I shoot the loads at multiple distances out to 1000 yards. Then I use a ballistics app (currently using Applied Ballistics) to “true up” the BC to match my real-world results. But best of all, if you have a question, or need guidance, you can call them and talk directly to folks that are really helpful.