I found some information on sand bag weights on another site that was very interesting...
Hi its douglas Mizzi from land based shark fishing australia. This is a problem that we dealt with over the years. We have made up grappling hooks, weights, you name it we have done it. The best and most succesful to date is the sand bag. Heres how it works. Get a sand bag, or make one up, another good idea are those recyclable material bags that all the supermarkets are getting you to change in the event of reducing plastic bag pollution. Anyway fill the bag with sand and eithere secure it with may loops of 80# line or zip tie it up. Now you have a weight. Choose one line class less then you are fishing, ie 80# use 50#, 130# use 80# etc. make the line about 3 feet in length and tie a knot in the middle of the line about a foot and a half up. Now tie one end to the bag use some granny knots or a heap of half hitches, and tie the other line to the bottom hook, thats the one furthest away from the trace. When you deliver the bait to the water place the bait in the water then first then place the bag in the water and let it go in one smooth motion.
Now the bait will stay where its meant to, the only time the bait will move is when there is a shark bite. By tying the line to the bottom of the hook the shark will bite the line off, giving no resistance to the bait allowing a clean pick up. Having grappling weights can and often will impede a sensitive hook up. By using one weight catagory less than your main line, and tying a knot in the middle of the securing line, a quick and swift run up the jetty or beach will break off the bag in the water allowing an easy retrieval unlike a fixed weight or grappling hook.
Years of trialing this in Australia has seen this to be without doubt the most effective weight system to use. The advantage is that you can carry many bags flat packed filling up what you need on the beach.
Chris if you want to add this to your site, please denote as information given by Australian shark fisherman . Hope this helps guys, and this ones a winner. <?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:shapetype id=_x0000_t75 stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:connecttype="rect" gradientshapeok="t" o:extrusionok="f"></v:path><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:lock aspectratio="t" v:ext="edit"></o:lock></v:shapetype><v:shape style="WIDTH: 11.25pt; HEIGHT: 11.25pt; VISIBILITY: visible; mso-wrap-style: square" id=Picture_x0020_1 alt="Cool" type="#_x0000_t75" o:spid="_x0000_i1025"><v:imagedata o:title="Cool" src="file:///C:\DOCUME~1\MC5C1~1.ZAR\LOCALS~1\Temp\msohtmlclip1\01\clip_image001.gif"></v:imagedata></v:shape><o:p></o:p>
OMG I cant believe Im doing this... first of all doug and chris, yall are outstanding fishermen!
Ok, Personally, I use either a graple or sand bag depending on my hook choice. I rig them both as doug explains, tied to the bottom hook(got it from his site last year).
Graples... I use a good graple with 'J' hooks and set a heavy trap (rigged like Doug but same idea as Deavers mouse trap), maybe even 12#-15# with 50class. A sandbag will sometimes (often) drag with a heavy trap like that. The original reason I did this was thinking too much and trying for the quick solid hook set to prevent a shark from being gut/throat hooked (catch and release) and it seems now the reality is I like it because I dont get as many teeth marks in my bait without at least knowing about it. I even loop the mono weight trace over both hooks when using a double stingray rig. It works well most of the time, not perfect and of course I loose my graple ($) when a shark hits.
Sand Bags... I use them with a very light trap when Im fishing circle hooks, rigged just as Doug explains with little or "no resistance to the bait allowing a clean pickup" as I believe Circle hooks need more time to get in position for a good hook set than a trap provides.
My point i guess is that the sandbags will sometimes drag with a heavy trap and/or big baits in heavy currents, I use the graples in those situations. So, there is a place for both in my tackle tub.