Typically the 17 Mach 4 was barreled with a 10 twist barrel. If that is your situation, 25 grain V-max length, bullets are not likely to do well in such a barrel with any recipe. 20 grain v-max is likely to show improved results.

love, joy, peace, patience, kindness, goodness, faithfulness, 23 gentleness, self-control

& Proverbs 21:19