Thread: Range day

Greetings @scotty and all,
Looking back in my records I see that my first attempts at multi loading were trying to develop a hare load that would shoot close to the same point of impact as my 180 grain flat nose projectile. The light loads with 100 and 110 grain varmint projectiles shot up to 300 mm higher than the hunting loads. My first .223 was then purchased and that was the end of that. A bit later I had changed to a 150 grain Norma projectile for the main loads which was zeroed at 200 yards. We shot our target comps at 100 and 200 yards in those days so a load that shot to point of aim at 100 was needed. The standard load was 47 grains of IMR4064 with the hunting projectile and 45 grains of IMR4895 with some salvaged .30-06 150 grain military projectiles shot to the same 200 yard zero. 43 grains brought that down to dead on at 100 yards. An attempt was made next to get the 130 grain Speer HP to match the 150 grain point of impact. I could match it for height but it shot left. Another good idea down the drain.
About 4 years ago I did some testing of the Speer 125 grain TNT together with the 150 and 165 grain interlocks and 5 different powders, The aim was to see how different the velocities were with the various powders and how good the load data was. The test loads were shot in my .308 with a 20" barrel and suppressor at 60 metres. The powders were IMR8208, AR2206 and AR2206H for the 125 grain with IMR 8208 replaced with IMR4064 and AR2208 with the heavier projectiles. Only one charge weight for each projectile. the findings were that accuracy improved as the projectile weight increased with both the 125 grain and 165 grain projectiles shooting slightly to the right of the 150 grain especially the 165 grain.
More later.
Grandpamac.