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I've never encountered this, but let's assume you have a unit with a BS of 6 or higher. According to pg 18 in the BRB, this unit would be entitled to a re-roll to hit based on how high their BS is (6+ for 6, 5+ for 7, 4+ for 8, etc. etc.)
Now assume your unit targets an enemy unit that has a rule to the effect of "you must reroll all successful rolls to hit this unit in the shooting phase"
By my understanding, you never re-roll a re-roll
So.. how would you proceed?

1) Roll to hit
2a) Result is 2+, reroll due to success (continuing to hit on a 2+)
2b) Result is 1, reroll due to BS6 or higher (continuing to hit on a #+ (dependent on BS))
3) Accept result from 2 (hit or miss)

Re-roll the miss, if you hit, then the "re-roll hits" rule is ineffective. Precisely because of the "never re-roll a re-roll" rule.

If you have the ability to re-roll due to a high BS, HIWPI, is
1. roll to hit
2. Take all hits and put in a pile.
3. Re-roll hits, requiring a 2+ to hit.
4. Re-roll misses at the penalty.

If it was something else allowing the re-roll (i.e. TL), the FAQ says technically you re-roll all, but to save time, don't bother re-rolling anything.

If its the same roll needed to hit such as a twin linked gun, You just lose the twin linked ability and roll once. Is that how every one else plays it? Like with eldars re-rolling saves vs perils of the warp? It should work the same way with the high BS, you getting to re-roll misses, and have to re-roll hits should cancel out and you take the first roll. miss or not.

Seems like pretty murky waters to me. Also, I'm not even sure there's a unit with a special rule like the target unit in 40k. Does anyone know of one? Also, BS6+ models are exceedingly rare, mostly special characters and Eldar/Dark Eldar HQs, so I don't see it as much of an issue. I just had a 'what if' thought pop into my head. Personally, I think Shrike's and Happyjew's approach would be the best compromise for both players, but I could see rules lawyers running it into the ground during a tourney. A judge, a TO or the golden rule will most likely have to be involved in my opinion

themandudeperson wrote:Seems like pretty murky waters to me. Also, I'm not even sure there's a unit with a special rule like the target unit in 40k. Does anyone know of one? Also, BS6+ models are exceedingly rare, mostly special characters and Eldar/Dark Eldar HQs, so I don't see it as much of an issue. I just had a 'what if' thought pop into my head. Personally, I think Shrike's and Happyjew's approach would be the best compromise for both players, but I could see rules lawyers running it into the ground during a tourney. A judge, a TO or the golden rule will most likely have to be involved in my opinion

Shrike325 and Happyjew not only provided the best compromise, but they also provided the absolutely 100% RAW answer. So, you shouldn't have any issues with rules lawyers (unless they're rules lawyers who don't know the rules, those players are the absolute worst).

PapaPiggy wrote:If its the same roll needed to hit such as a twin linked gun, You just lose the twin linked ability and roll once. Is that how every one else plays it? Like with eldars re-rolling saves vs perils of the warp? It should work the same way with the high BS, you getting to re-roll misses, and have to re-roll hits should cancel out and you take the first roll. miss or not.

Technically, you:
1) Roll
2) Ignore the result of 1
3) Roll again
4) Accept the result of 3 with no other re-rolls possible

Yes, it can be much simpler to just skip steps 1 and 2. But, make sure that both players are totally clear that that's what you're doing. You don't want to roll a success and have your opponent think you're doing step 1, when you thought you skipped it and are on step 3.

So what you are saying is that if i had the ability to make you re-roll to hit rolls, but because you are twin linked or a high bs my ability doesn't matter? and you get your re-roll? Doesn't seem right to me. but it is how people choose to play it. Can any one sight an actual FAQ? Or is there nothing on the books?

PapaPiggy wrote:So what you are saying is that if i had the ability to make you re-roll to hit rolls, but because you are twin linked or a high bs my ability doesn't matter? and you get your re-roll? Doesn't seem right to me. but it is how people choose to play it. Can any one sight an actual FAQ? Or is there nothing on the books?

Twin Linked only makes you re-roll misses. so your ability matters.

So if you had an ability that made me re-roll all hits, and my gun is Twin Linked (re-roll misses) then you would roll the dice and be forced to re-roll hits from your ability, and you would re-roll all misses from Twin Linked.

So in effect you only roll the dice once to save time, since you are re-rolling all hits and all misses.

PapaPiggy wrote:So what you are saying is that if i had the ability to make you re-roll to hit rolls, but because you are twin linked or a high bs my ability doesn't matter? and you get your re-roll? Doesn't seem right to me. but it is how people choose to play it. Can any one sight an actual FAQ? Or is there nothing on the books?

That's not what I'm saying at all. My ability to re-roll misses and your ability to re-roll hits cancels each other out. It makes it so the entire outcome comes down to a single roll with no re-rolls.

Re-read my step-by-step process above.

Actually Grakmar, they do not cancel each other out. Per the FAQ you are technically suppose to re-roll all of the dice. However, to save time you just roll once. If you have time to waste, then you better be re-rolling everything.

Replace "saves" with "hits" in this FAQ:

Q: If a unit has a special rule that lets it re-roll failed
saves and is being affected by an enemy special rule
that makes them re-roll successful saves how is this
resolved? (p25)
A: Whilst you should technically roll all the dice and
then re-roll them, just roll the saves once and apply the
results to save time.

kmdl1066, the only issue with using that as a reference is when dealing with units that get to re-roll due to high BS. Normally, that's HYWPI, however, since the high BS re-roll has a lower chance of success (usually), you can see the problem. Just not sure how to put it in words.

Happyjew wrote:kmdl1066, the only issue with using that as a reference is when dealing with units that get to re-roll due to high BS. Normally, that's HYWPI, however, since the high BS re-roll has a lower chance of success (usually), you can see the problem. Just not sure how to put it in words.

That is avoided, though it may mean that you DO need to roll then re-roll [in such cases as high BS].

The question assumes the odds are the same both times.

editing to add:
That assumption is based upon saves, which have only sideways application of changing values in this instance

Like I said, I would split the first roll in 2 groups. The successes would be re-rolled and hit on a 2+, the failures would re-roll and hit on a (6+/5+/4+/3+) depending on the BS. If the re-roll failures was on the same number (i.e. BS 10 or TL), I would go by the FAQ.

The re-roll ability still matter, statistically you are 'un twin-linking' the gun itself.

Yeah, I provided no context when I posted the FAQ. It was in to reinforce DR's "only roll once for twin linked vs re-roll successful hits" approach..

I agree that the changing odds on a 6+ BS re-roll means you have to split the results as you've described.