Those rifles were designed to fire factory ammunition loaded to SAAMI industry standard pressures. But - the rifles do have a reputation for short lives, so loading to below-max pressures could extend their lives. Or not. The only other common problem was an occasional ejection issue, which was remedied by replacing the M740 with the “improved” M742.
If it were my rifle I’d not load “2 grs below max” but rather follow safe reloading practices by using a listed starting load and working up one grain at a time. I’d also remember that an extra two or three grains of powder never made any difference when shooting game suited to the rifle.
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