PBR,

Even if the powder Wootters used was H4895, it wasn't the H4895 of today. Plus, it doesn't matter an awful lot whether you use H4895 or IMR4895 for reduced loads. Hodgdon advises H4895 because the results are often (but not always) more satisfactory than with IMR4895, but the formula they list on their website is safe with either powder.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck