Originally Posted by long range erik
Im confused, if faster twist rate mean you can fire heavy and light bullet, why don't all barrels have a fast twist rate. Is this because it is harder or more expensive to produce or is it because slower twist rates are more accurate for certain bullets ect.
Its because every bullet has an 'ideal' twist rate that works best for that individual bullet based on its length, velocity and weight etc. Gun makers can only barrel a rifle with a twist rate that they think will be the best compromise for all the bullets likely to be popular with that particular rifle they are bringing to market.
much like a car has features within a given model based on which market that model is likely to be sold to. its not perfect for everyone, but rather works for most people in most instances, in order to be appealing to the majority, to sell as many as possible...
different rifles have differnet purposes, and there are different bullets for many calibers... some are suited for long range, some are suited to short range, off hip hunting, some are suited to varminting, some for big game, the list goes on... one twist rate will not be ideal for everything, so people and gun makers try to best match a barrel twist rate based on its intended purpose (and therefore bullet type) for that type of gun.