Would you enter the Indy 500 with regular gas?
Build a race care and use race car ammo or accept the consequences of not.
You have 2 choices... Slow twist and short range accuracy only with light bullets and crappy accuracy at long range... or fast twist and get good short and long range accuracy with heavy bullets, but crappy accuracy with light bullets... but since its a close target... you will hit it anyway even with crappy accuracy.
There is no in between.
Heavy bullets from a slow twist barrel will provide dismal accuracy and light bullets from a fast twist barrel will result is dismal accuracy.. or bullets that fly apart in flight from spinning so fast.