About to start reloading Quick Question.

[quiet_lurker]

Have tried some of the 125grn Pro Hunters. Accuracy was awful. In a couple of different No.4s that were both capable of very good accuracy.

Stick with the 180grn Sierra Pro Hunters.

These rifles are old, many have much loved and sometimes abused barrels.

The more projectile you have in contact with the rifling the better it will stabilise the projectile. A longer/heavier projectile achieves this.

I know I haven't answered your question re a light load. Just my experience with lighter projectiles in 303 rifles.

Your rifles may be different.

Regards

Mark