Home › Forums › Friends of FOC › Is there a general guidline as a STARTING point?

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    • handirifle
        July 16, 2012 at 4:00 am
        Post count: 409
        #5282

        Referring to making aluminum EFOC shafts, with a 54# recurve. I have been playing around with what I have on hand, and these are FLETCHED arrows, not bare shaft. My draw is approx 27″ and I am probably pulling closer to 50-52lbs with this bow.

        With the arrows on hand I am getting outstanding flight and groupings (3″ @ 15yds) with XX75 2113 shafts, and 125gr field points. Like I said these are not bare shaft. Obviously if I add a lot of weight up front to these they will be spined too weak.

        I can test those later, but if this is any help, and say I wanted to add another 100gr up front, would I be better to start with say, 2018’s or 2117’s, with the 125gr points. The 2113’s weighed in at either 438 or 468gr, I cannot remember and I am on a long trip across country at the time, so I cannot check for sure, or give any more accurate info, which I apologize for. Any help I can get is appreciated.

      • Bruce Smithhammer
          July 17, 2012 at 1:32 pm
          Post count: 2514
          #40795

          I’ve never played around with aluminum arrows for EFOC setups, so I can’t offer a lot of useful specific advice there. But my first reaction is that a 2113 shaft is a fairly heavy shaft to start with, if you’re trying to get EFOC.

          Yes, adding more weight will weaken the spine. However, I wouldn’t necessarily assume that they would be “too weak.” If anything, a 2113 should be able to tolerate a fair bit of weight up front before it’s going to be “too weak.”

          You’re shooting a recurve – is it center shelf cut? If so, center shelf cut bows tend to be more tolerant of a wider spectrum of spine.

          Since you already have the 2113’s, start experimenting with what you have. It’s easy enough to add a 100gr. insert and see how they fly. But if anything, you’re probably going to end up wanting a lighter shaft – remember it isn’t just about a heavy arrow, but a heavy arrow with most of the weight in the head. And you might also consider switching to carbon, where a lighter shaft will help immensely with achieving EFOC.

        • handirifle
            July 17, 2012 at 2:24 pm
            Post count: 409
            #40840

            Thanks, never thought of the 2113’s as being heavy before. Not aware of any heavy inserts for that size shaft. I have a small sampling of the other sizes I mentioned, maybe enough to test with, not sure.

            When I get back home I will have to play around with thd various sizes I spose.

          • Bruce Smithhammer
              July 17, 2012 at 2:41 pm
              Post count: 2514
              #40849

              handirifle wrote: Thanks, never thought of the 2113’s as being heavy before.

              I should qualify that by saying that they are “heavy” for a typical EFOC setup. Not sure which model you have, but most 2113’s seem to be 10gpi and up. The more weight you have in the shaft (along with larger than necessary fletching), the harder it’s going to be to get a high percentage up front. Keep us posted!

            • handirifle
                July 17, 2012 at 3:06 pm
                Post count: 409
                #40872

                You probably did say that but I didn’t continue the thought, but I see what you mean. I probably wasn’t understanding the concept fully, but now I have a better perspective on it.

                It will take me a bit to actually start, since I am currently in Arkansas, (live in Ca) and on, my way to Huntsville, getting back home in about 2 weeks.

                I will post when I actually start testing.

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