What fits the bill? Zwickey Delta's have me covered for my setups that need 200 and 250gr points but I'm looking for something similar that I can weight to 300gr. 175gr would be minimum needed as 125gr adapters are the heaviest available.

There's a few options out there but I haven't seen any at a similar price as the zwickey. They seem to all be the same price, but only 3 packs. Which is twice the price.

Nothing in the zwickey price range.

Otherwise look at Simmons tigersharks/ bacon buster from belcher bows / tusker.

Alternatively use molten lead in the glue on adapters to get weight up. You could also do a combo of footing, inserts and weighted adapter to achieve the same.

The 125gr adapters I have are solid. No hole to fill with lead to add more weight. It might be best to add more weight to the insert and use 250gr heads I already have.

I was facing the same problem a couple of years ago, I wanted to shoot Z Ds but wanted them to weight 300 grains

I ended up using a angle jig to grind 225 grain field points down into 175 grain adaptors


other than that you might look at Ace super express broad heads

If you use a 2 inch footing you can gain around 24 grains.
Another wide 2 blade option is the centaur archery head, not sure if it's a glue on.

Already using a 2.5" footing. I can use the Simmons or centaur heads but they are more expensive.

After taking stock there might be merit in adding insert weight to allow me to use the 250gr heads I have. Just means adding a 50gr HIT insert behind the 100gr HIT insert already there.

Doing this would allow me to use the same BH's with the different arrows for my 58# & 70# limbs on my border. Less inventory to carry when travelling with both setups.

With a 2.5 inch footing on an axis and two hit inserts and that heavy broadhead - what are you hunting?
Seems a near bulletproof deal arrow wise.

Tuffheads offers broadheads in the weight you want and also adapters over 125, like 150,175,200 and more.

Big critters here in oz. 
Total arrow weight is 730gr out of my 70# border at about 190fps. I can use 5mm steel rod behind the HIT insert to make up the 50gr lost by going back to 250gr BH's. Just means I need to extend the footing to 3.25" total length to get back beyond where the 5mm rod will end. Can lengthen the shaft and retune for the longer footing.

Makes sense to have the same BH's for the 2 sets of limbs for interstate and overseas travel.

A lot more options in BH's when I stay with 250gr too. I think I've talked myself out of 300gr BH's

I think you should stick with regular I.e 175 - 250 grain heads with heavy inserts. And quit calling your projectiles arrows - lol. A serious setup you have there.

Just one more observation - with the heavy setup you have and the heavy critters shouldn't you look at heavy single bevels? I think that the grizzly glue on is a relatively value offering. Another thing you might want to check on is the new Bishop offerings. No idea if they shine for trad gear though.
Also why a steel rod, glue in a cast lead slug - will weigh more.

For this particular setup I want to shoot wider heads than the tuffheads. The tuffhead heavy adapters add more cost at $3/ea.

 
This will just be my general hunting setup for the 70# limbs. I figure I have the energy to make use of a wider BH.
If I ever get to hunt Buffalo again I'm cooking up a better setup for that. 950gr+, 300gr tuff head and custom adapters and footing.

looks like raptor archery still has some of the 1 1/2 magnus classic in 160 grain.

Tim at Braveheart has the Tusker Aztec at 175, or the Ace Express in 175 or 200.  I'd be remiss if I didn't mention the 200 grain Grizzly Instinct, not a wide 2, but an awesome 3 with good width, it's my choice for most everything.

You don't say how wide you want them but Grizzly Kodiaks are 1 3/16" wide.  I set  up a 235 gr. Kodiak with a 75 gr. adapter for 310 gr.  That extra 10 gr. over my field points is insignificant as far as I can see and shoot accurately.

Seems like you could still make the Deltas work.  For carbons, go for heavy inserts.  I use the 100 gr. brass insert for GTs.  Add in your screw-in adapter at 125 and the head at 135 and you're at a total weight of about 360 gr.  You can add another 50 grains to the back of the insert as well. 

For woodies, opt for woodie weights.  3-Rivers woodie weights go up to 200 grains.  Also, adding your 125 steel adapter to a 40 grain top hat woodie adapter puts you at 165 grains.  Add in the head & you're right at 300 grains again.  That may all rob whatever price advantage you were hoping to get out of the Deltas but it gets you to where you want to be.

cool, i thought the magnus 2 blades weren't made anymore? they are even wider than the delta.

thanks for all the suggestions. plenty of food for thought.

Looks like the Ace Super Express might work for you.

What about tuskers?
They should be easily available for you.
the 160grain delta is 1 3/8" wide.
The 175 aztec is 1 1/4" wide.
Price is right.

The other option I can think of is Ace heads.