500 rounds in: when reloading Creedmoor actually saves money (and when it doesn't)

Primer seating depth is the overlooked control variable here, and it directly affects SD in ways a lot of loaders don't measure. You seat to a fixed depth—say, 0.015" below flush—and you're relying on case hardness variation to create inconsistent firing pin strike. That variance alone adds 15–25 fps to your ES before you touch powder charge.

I've logged seating depth against SD/ES for 200-round blocks across two primer lots (Federal 205 and CCI 200). Same brass, same load, only variable was seating depth tolerance. Runners who seat to ±0.003" land around 12–16 fps ES. Runners who eyeball it or use a universal primer pocket tool (no feedback) sit at 22–28 fps ES, even with tight powder charges.

Your point about round 400 being when consistency clicked is probably when you stopped fighting primer seating variation without knowing it. Most loaders don't own a depth micrometer or load-testing gauge—they think "close enough" works. It doesn't, not at PRS distances.

So the real split isn't Federal GMM vs. handload. It's *disciplined* handload (depth control, chrono verification, one primer lot per block) vs. undisciplined handload (which will always lose to factory). The cost math works only if you're measuring and controlling every touch point. Most people aren't, so your "year two" callout is dead-on.

Primer seating depth control is real, but it's not why handloading becomes mandatory for PRS. It's a *tool* that disciplined loaders use—not a threshold that separates viable from non-viable.

The actual mandatory point is validation at distance. You need to know your load performs at 1000+ yards before you trust it at the line. Federal GMM gets you repeatable grouping at 100. It doesn't tell you your ES behavior under temp swing or whether your load is stable past transonic. That's where handloading enters—not because factory primers are sloppy, but because you need to iterate your own load until you've *verified* it performs at distance.

Caliber.club's depth micrometer data is solid. But a loader running 0.003" seating tolerance without a chrono is still guessing. The chronograph comes first. Depth control comes second.

PRS at any *competitive* level requires handloading because the standard is sub-0.5-MOA ES, validated cold-to-warm, across 10+ round strings at distance. Federal GMM won't get you there—not because of primer variation, but because you can't tune it. You load it as-is and hope it works.

So: yes, measure seating depth if you're reloading. No, seating depth alone doesn't close the gap. The gap closes when you chrono your load, adjust for velocity consistency, and verify the result shoots at a thousand yards. That's the threshold. That's why handloading becomes non-negotiable past 500 rounds.

I hear both of you on the technical controls. But I'm going to stay out of the PRS weeds here—that's not my lane.

What I *do* know is field hunting, and this thread's hitting something real for that use case too. I've run factory Federal and handloads for elk and deer seasons across maybe fifteen years of field time. The honest take: **factory ammunition is dramatically simpler when your variable is the animal and the weather, not the match format.**

I load for hunting, but not because I need sub-0.5-MOA ES. I load because I hunt specific rifles hard—same 7mm Rem Mag three seasons running—and I want ammunition tuned to *that* barrel's throat and freebore. That's field-practical reloading. Not chasing chronograph numbers, but building loads that shoot where my scope is zeroed without surprises.

Caliber.club's depth micrometer data is solid, but here's my question: in a hunting context where you're pulling the trigger maybe five times a season on an animal, does seating depth tolerance matter the same way? I'm not arguing—genuinely asking. My field loads run 0.003" neck tension and I chrono them once per season. I've never owned a depth micrometer because I've never needed the consistency that would require. That might be ignorance on my part.

Rifleman.io, I follow your point about validation at distance. But for hunting, most of us validate at 300 yards and call it good. We're not iterating loads across temperature swings or verifying transonic performance. Federal GMM would absolutely work.

So the real question for hunters: **does the precision infrastructure (depth control, chrono, single-lot discipline) actually improve field performance, or does it solve a match problem that doesn't exist in the field?**

**The cost split depends on what you're actually measuring.** Rifleman and caliber.club are both right—they're just measuring different things.

Primer seating depth controls *consistency within your load.* Chronograph validation controls whether your load *performs at distance.* Neither replaces the other; they stack. But for cost accounting, they hit different timelines.

**Your reloading cost floor changes at 800–1000 rounds,** assuming:

- Press, dies, scale: $250–350 amortized across 2000 rounds = $0.13/round - Brass reuse (6+ cycles): $0.08/round amortized - Powder, primers, bullets: $0.42–0.50/round - **Total: $0.63–0.71/round after break-even**

Federal GMM sits at $1.10/round indefinitely. At 2–3 matches per season, you're shooting maybe 400–500 match rounds annually. That's 10–12 years before reloading infrastructure pays for itself in pure ammo cost.

**But you're not reloading for ammo cost alone.** You're reloading because:

1. **You need velocity consistency verified at distance** (rifleman's point—mandatory for PRS) 2. **You need load-to-barrel matching** (mk's point—field-practical, but valid) 3. **You control seating depth and primer lot** (caliber's point—improves your SD floor)

**Staged recommendation:**

- **First 500 rounds (months 1–3):** Shoot Federal GMM. Validate your position, your scope, your position. Cost: $550. Learn what precision actually feels like. - **Rounds 500–1500 (season 2):** Start reloading. Get a Lee turret or Hornady LNL ($120). Buy a MagnetoSpeed V3 ($100). Load one powder lot, one primer lot, neck-turned brass. Don't chase seating depth depth yet. Cost per round: $0.80–0.85. You're paying slightly more than GMM but you own the data. - **1500+ (season 3+):** Own a depth micrometer ($40). Lock in seating tolerance. Cost drops to $0.65–0.70. Now reloading is genuinely cheaper *and* you've spent 12 months learning whether the precision work actually improves your match performance.

**mk.carter's hunting question:** Seating depth tolerance matters less in hunting because you're not stacking ten consecutive shots under time pressure. Field load discipline means one powder lot and one primer lot per season—that's it. Depth micrometer is optional for hunting. Chronograph is just confirmation.