Thread: Garmin Truth - 284 Win velocity

Originally Posted by Rated M for Magnum

I found something similar but different with mine.

Across several rifles, I found a difference of 50fps with the Garmin reading faster sitting at about the front of the stock and the optical about 5 meters on front.

Rifles were 300wsm, 243 win, 17hmr and a 7mm rem mag. I validated the 300wsm and 243 out to 700 metres and the chap whose rem mag it was shoots deer out to 500 on a regular basis. Since then I just go off my optical chrono speed.

I’d check with a Labradar as I wouldn’t believe the optical (based on mine sometimes high and sometimes low) - you might just be 10mm higher at 100m vs what you thought was POI and making the 500m hits ok…

Post a 300wsm and 243 load and ask someone to check on GRT for interest