Nanook,
your 1 winner in 4 gets you 108 back for every 100 outlayed. So 25 on each with one winner means you got an average bet of 83/25 about the winner, or odds of about 4.33 in the new or a bit over 13/4 in the old.

Not sure what your drawdown means, except perhaps you are using a proressive staking plan.
At a 25% hit rate, you can expect (over 10,000 trials), a 100% chance of striking a run of outs of 19, a 50% chance of 28 outs, a 10% chance of 35 outs and 0 chance of 62 outs.

Better check my maths though as I am careless with numbers.