How do I know what size of Arrow length and weight I need?
I have a used 04 Martin Tracer LT with a wisker bisket arrow rest and a 29" draw. Is there a calculation a person can do to find the length of arrow needed or does a person need to go in and have a shop measure your length?
Does anyone know of a good arrow combination with this model?
Check the Easton web site..
Check the Easton archery website (or any other arrow manufacturer) they will have either charts or a fill-in-the-blank program to help you select the right arrow. The draw weight, type of cam, type of release, length of arrow you want to use, & weight of point are some of the factors to be input.
As a general rule, they recommend you have about 1 inch of shaft in front of the point where your arrow last touches the rest. That is probably conservative; I generally use about 1/3 to 1/2 inch past the front of the rest. However, you should keep in mind that the shorter the arrow, the stiffer it will be. The AMO standards for "spine" are based on a set length of shaft, I believe it is 30", but it might be 28 or 29. The point is, if you have a really short draw length (say 25"), you may need to use a little longer arrow to help make tuning a little easier.
The Easton program will tell you several options, from ultra light to heavy weight. The choice is up to you. If you have a Martin, it should be warranted for use of arrows weighing not less than 5 grains per pound of bow weight (that is total arrow weight, including point - thus 60 lb bow = 300 grain arrow min.) For most shooting, there is no need to go that low, unless you just want to shoot through a crono and brag about how fast your bow shoots (some people actually do that.) I love fast bows - I generally buy faster rated bows, but I then equip them with arrows a little heavier than the minimum (generally about 30 -50 grains higher). I still get the flat-shooting speed benefit, but without pushing my bow's limbs too much.
Hope this helps.