Increasing weight and FOC

[Schultzy]

Is this going to be tough to do with an aluminum arrow? I'm hearing It's going to be. My current set up Is an Easton XX75 2216 4" 4 fletched cut 31" long. I'm weighed In at 561 grains total Including my 125 grain 3 blade Snuffer. My FOC as of now Is a low 7%. I want It In that 15% to 20% range. My current recurve Is 61lbs at 28". What's a guy do? I'd like to stay with Aluminum's If possible.

Thanks.

[TomMcDonald]

you can add weight using heavy broadhead adapters. I'm not sure about inserts for aluminiums, but you could try a hardwood footing like people are experimenting with here.
I shoot a 60lb bow and achieve 25% FOC with around 800grains overall weight. Arrows fly true.
You can do it.

[vtmtnman]

Steel insert or steel Bhead adapter.

[Earl E. Nov...mber]

A piece of 20xx aluminum shafting should fit inside of it..
Might be a bit tight, but sanding it should get it to fit.

[ishoot4thrills]

Careful putting too much weight up front with your current arrow spine/length, as you will weaken the spine considerably. To get the FOC you're wanting/needing, you may have to cut your arrows shorter or go to a stiffer spine.

[Schultzy]

Originally posted by Mike Walker:
Assuming you need the 31" arrow,I would go with a 2219 and use a 100 steel BH adapter.This with your 125gr. BH will put your arrow weight in the 700gr. range and your FOC around 15%.

>>>-------> Mike

My draw length Is 28" so no I do not need all 31 Inches of arrow there. I can take off an 1 1/2. What are you suggesting?

[Bob L.]

I'll tell you how I did it, originally from trying to weaken a shaft bare shaft tuning. I shoot  33" 2314 aluminums, I have a long draw. They were still showing stiff with my max field point weight of 250 grains. So I said how can I increase more point weight for them to be weaker to tune. I took 4.75 inches of 2514 aluminum shafting and footed the shaft on the outside which added an additional 50 grains of weight to the front. I wanted the arrow to start way to weak so I could slowly trim the length of footing until the bow was bare shaft tuned correctly. I ended up trimming the footing til it flew well and it ended up being 35 grains. so I now have a great flying arrow with 285 grains up front and my foc is at 20%. My arrows weigh 711 grains fletched. 2 things I like about the footing
I can now shot 250 grain broadheads or field points which are easy to make up with glue on heads and steel inserts compared to trying to figure out how to make a 285 grain broadhead and I think they are tougher I have hit a rock and bounced off a tree that I would of swore would have bent my aluminum before. I know how hard it is to get high foc on aluminums especially if you have very long arrows. Another suggestion may be to try with a lighter grain per inch will help increase foc. The 2216's .375 spine weigh 12.0 gn/inch the 2413 weigh 10.4 gn/inch similar in spine.
Bob

[Whump]

Whump Sez: Here's How: take your insert out and use a #29 drill bit to drill out the back side of the insert---There is a small hole already there to start your bit. You can hold your insert with a pair of vise grips with very lite pressure---you are working with aluminum here so it is easy to drill. Just drill until it breaks through--about 1/16". Now take a 10 and 32 tap and start it in the end you screw your point in---go slow here and be sure you get your tap started straight with the existing threads--keep turning the tap until it sticks out the back of the insert. Your insert is now tapped from end to end with 10 and 32 threads. You now can use the carbon arrow weight systems on your aluminum arrows or you can purchase 10 and 32 brass bolts and add 50 to 60 grains per bolt depending on what length you use.A 1" bolt is about 50 grains, 2" 100 and so forth. Smaller diameter shafting like 2018 will require reducing the dia. of the bolt head so it will fit in the shaft. 2314 and larger requires no reduction of the bolt head. Just be sure and screw your point in first before adding the weight so the weights will not interfere with your broadhead or fieldpoint seating all the way down to the shoulder of the insert. I am giving this info away free to all my trad buddies. Hunt safe.

[Diamond Paul]

Steve, cut the 1.5" (actually, if you only draw 28", you can cut down to 29" or so) off the arrow.  Your arrow has now become quite a bit stiffer in spine (shorter=stiffer).  Cut to 29", it's likely you will need 200-250 grain point to make the arrow tune.  You now have quite a bit more foc and total arrow weight and can stay with the arrows you now have.  If you want a super heavy arrow, do what Mike suggested and switch to 2219 shafts, but leave them longer, as they are already stiffer than 2216's.  Paul.