Got on gunbroker.com a couple of weeks ago and found one of these. Quick tests with nine factory loads average 50 fps slower than in my 22” M-700, or about what I’d expect for lot-to-lot variation, temperature shifts, etc. In other words, no meaningful difference.
This rifle loses 100 fps with two handloads: a slowpoke to mimic the 30-30 for shooting little deer in thick brush and a screamer using the Barnes 130-grain TTSX. The slowpoke still falls squarely into 30-30 country; the screamer is faster than any 130-grain load that Federal lists for the 270 Winchester.
Average three-shot groups with these nine loads is 1.28 MOA with a 4x Leupold. Without the worst group, it’s 1.12 MOA. A more powerful scope would likely improve that.
Okie John
