I get calls all the time from shooters who need to match up their ammo to the BDC or custom turrets of their scope. Here's a call I just got regarding the 28 Nosler. My customer built a full custom rifle and is paired up with a high end Vortex HD scope with a custom turret. The turret was programmed for factory 28 Nosler with the 175 LR AB (long range Accubond) bullet. Now the factory Nosler ammo box says, as well as the Nosler Website link promote 3125 fps with 175 LR AB bullet. This customer has the factory ammo chronographed and documented to make this "custom turret" for their high end scope. The ammo chronographed at 2915 fps.

So here's the issue. The factory ammo runs 2915 fps in his rifle. My 28 Nosler ammo easily runs 3150-3180 with the same bullet in the same length barrel. That's 265 fps LESS than what the 28 Nosler is capable of. The problem my customer is having is the factory ammo shoots very poor in his rifle, and slow. He wants to change to a better load or more consistent ammo, but he wants his turret to line up also. So I have to load my 28 Nosler ammo down to what the turret is set for. His high end 28 Nolser is now just a 7 Rem Mag. Sure it will work just fine, and the 7 Mag is a great round.

My point is, the velocity on the factory ammo box is often not the actual velocity you are getting. And in his case, he's not getting the 28 Nosler performance that he bought!

So what happens if the slower ammo you make to match the turrets he has doesn't shoot worth a poop? You can't control harmonics, you can just find the sweet spot/s. As you know Chad, there are things I don't know or know well in this hobby but seems to me he/she has put the horse before the cart.

So what happens if the slower ammo you make to match the turrets he has doesn't shoot worth a poop? You can't control harmonics, you can just find the sweet spot/s. As you know Chad, there are things I don't know or know well in this hobby but seems to me he/she has put the horse before the cart.

I chrono'd your loads, they were off 60-80 fps from what the box says. The Hornady I chrono'd matched their box. Same day/gun/time/chrono. Now I can see how your chrono and mine don't match up, but apparently mine and Hornady's do. 6.5 143 24" with a suppressor. Fireman says my rifle hasn't 'sped up' yet, but that will mean with Hornady I'll be getting FASTER than what the box says.

YMMV, as may everybody else's.

You have the right idea there but think it is cart before the horse

you could have fixed it for me, I R slow some days

Yes, my last batch of 6.5 CM is running slightly slower than my last batch. The H4350 powder I'm using does have some variation from lot to lot, and can vary slightly. But not 265 fps!!! I have seen a need to increase the powder charge some to equal the known speeds. But it's still really close.

I met a customer out at Jason's range to chrono his Hornady 6.5 CM factory ammo. He said nothing would line up on his drop charts and couldn't figure it out. The Hornady Black box ammo (140 BTHP) was running 2540 fps and the Hornady Match 140 ELD-M was running 2560 fps. Box said 2700 fps. That's a lot of variation! He was mad. He had spent a lot of range time trying to figure out why nothing lined up on his drop chart. I had also brought some of my ammo to shoot. Not only did it shoot better, but it was almost dead on for the velocity which is what he needed.

Try to stalk within 300 yards and it won’t matter much.

Might not be possible, where I've been all week. Which is the mountains of Brewster county, Texas. There's more than flat land, and 40' tall trees, and a feeder at 100 yards in this state.

This customer has the factory ammo chronographed and documented to make this "custom turret" for their high end scope.

So why has he come to you for ammo? Why not buy what he built it for, factory ammo? Did I miss something?