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Okay okay, so it's highly impractical, given that D10s tend to be more expensive, bigger, and generally difficult to stack in an box... But let's get hypothetical.

So imagine 40k is based on a D10 system, instead of D6. What are the advantages? What are the disadvantages? Here's a list of the pros and cons:

Pro:
-Stats are already based on 10 (nil or 0 to 10)
-Larger degrees of success/failure, more variety
-Die rolls that require a high roll fail more often
-Die rolls that require a low roll fail less often
-Only 1 die for all stats tests

Cons:
-Requires total readjustment to stats
-Requires readjustment to some die rolls (1d3 can't become 1d5 without problems)
-Your old d6s will need to be replaced with new d10s
-Not stackable
-Changes to other parts of the rulebook to compensate may be problematic
-Why fix what aint broke (I'm kidding myself)
-Possible game breaking (see below)

Uses:
How to hit: Roll die, if equal or under the BS value, you score a hit. BS 10 allows a reroll to hit on a 1.
How to hit: Roll die, if equal or under the LD value, you succeed. LD 10 allows a reroll to succeed on a 1.
Psychic test: Roll die, if equal or under the LD value, you succeed. Roll of 1 or 10 causes perils. LD 10 allows a reroll to succeed on a 1, still causes perils if second roll fails.
Charge: Roll 2d10, pick the highest. Fleet allows you to reroll any of these dies.
Move through cover: Roll 2d10, pick the highest.
Run: 1d10" in any direction
Fallback: Roll 2d10, pick the highest.

Necessary changes:
-Movement will need to be based on 10, not 6; mainly because of move through cover and run. Alternatively, we can adjust this to by making run and move through cover based on 1d5+1.


I'm definitely missing some other things, if you can point out the advantages, problems, and necessary changes, please let me know; I'd really like to try it somehow.

Interesting, and I have lots of D10s for DH.

Or d20 like in dnd?

An unseen issue becomes ranges.

Once movement has shifted to base 10, ranges need to be similariliy modified, as so does the table.
Everything need to be doubled by 10/6 in order for it to work (so pulse rifle range is 50 inch now, and it rapid fires in 25 inch, but the table itself is 80*120 inch rather then 48*72)

If you DONT do this change, you have single rendered all shooting useless, and the mere table itself irrelevant, as assault WILL be reliable at turn 1, every single time.
Biker moves 20 forward, assaults 2d10, taking highest, meaning hitting someone that is 26-28 inch away should be a common even. unless the shooter force hugs the rear end of the table, he might not even get a single turn of shooting.
And if he does, he will have one-at best. as even foot sluggers will cross about 30 inch withing 2 turns, and real assault units will cross a wooping 50+ inch, even on short table edge deployment, you got nowhere to hide.

I don't think he proposed that this would affect movement. Just bs/ws/ld/toughness and stuff. I think it's not a bad idea to make difference between models more specific.
For example when you look at toughness characteristics. An exalted daemon prince is currently exactly as tough as a simple spacemarine on a bike. How so? And if you make the step more accurate, for example if t is min 1 max 20 - A spacemarine has t8, a biker space marine has 9 (i don't think a bike should give +2 here actually) and a daemon prince with around 10-11. While a riptide or any other currently t6 mc having 11-13 and ork warboss on a bike having 11.
Thus:
Grot - t4
Imperial guardsman/Tau firewarrior - t6
Spacemarine/Ork boy - t8
Spacemarine biker - t9
Ork warboss - t10
Ork warboss on a bike/ Daemon prince - t11
Riptide, Hive tyrant - t12
etc.

There is a problem with the resolution methods 40k uses.
it was developed for ancient massed combat and works fine for WHFB.

But for modern skirmish battles it is too limiting. You could increase the size of the dice used, all the way up to D100!!
But you are still using a fixed probability system , that limits the possible results.

Using a opposed or modified stat resolution method , removes this problem , while letting you use a D6.

I would prefer to change the resolution methods rather than the dice size.(because I like rolling loads of D6!! )

Lanrak wrote:
There is a problem with the resolution methods 40k uses.
it was developed for ancient massed combat and works fine for WHFB.

But for modern skirmish battles it is too limiting. You could increase the size of the dice used, all the way up to D100!!
But you are still using a fixed probability system , that limits the possible results.

Using a opposed or modified stat resolution method , removes this problem , while letting you use a D6.

I would prefer to change the resolution methods rather than the dice size.(because I like rolling loads of D6!! )

D%, it uses two D10's and unlike d100's doesn't have the problem of begin an overpriced golf ball.

The problem is the resolution methods used in 40k, not the dice size.