Part 1: Photos and detailed measurements of GGG 'Imperial'.
Part 2: On the range, On Target and Over the Chrono.
Part 3: Components - Powder.
Part 4: Components - Brass.
Part 5: GGG: Gas! Gas! Gas!
As the photo shows, the GGG powder is Ball/spherical, unlike the powders we're mostly familiar with in TR world which are extruded. Ball powders generally meter beter than extruded, so they can be prefereable for volume manufacturing, but most match ammo is made with extruded powder which has a reputation for producing smaller velocity spreads.
Remember the round that was 5 grains heavier than the rest?
Was the difference down to the powder charge?
See below for the answer:
| Powder | Bullet | Case + Primer |
Total | |
| Grains | Grains | Grains | Grains | |
| 42.848 | 155.020 | 182.382 | 380.250 | |
| 43.064 | 154.950 | 182.044 | 380.058 | |
| 42.998 | 154.938 | 187.122 | 385.058 | |
| Min | 42.848 | 154.938 | ||
| Max | 43.064 | 155.02 | ||
| ES | 0.216 | 0.082 | ||
| Mean | 42.97 | 154.97 |
Next: Part 4: Components - Brass.