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Morris, IL | I find the same problem with 7720 on 643, in good corn in high residue i can't get the ears away fast enough. Don't want to speed head up as seems more butt shelling. I'm traveling very slow at least compared to modern standards. 2.5-3mph with 7720 on 643. It varies based on conditions but sometimes it starts building up have to stop let it clean out. I noticed last year fungicide use makes big difference. I have ear savers on every row but can't believe i'm not loosing some in those conditions. If i make it over 2.5mph it will be a miracle as our crop looks pretty good.
I don't understand this whole overdrive/underdrive making a difference, i can speed head up doesn't make that much difference in some conditions. We have a corn reel for down corn would help in those conditions but other cons override leaving reel on unless i have too. I have tried every other paddle and didn't think they made much difference. Thinking maybe i should put them on every row i'm not sure, seems like in one year mine were shot seems like 200$ to throw away end of season is a lot.
As far as volunteer corn, tillage really makes a little look like a lot. Not that this is answer you want but i buy a corn killer for $1.20 an acre have spotless fields. I'm shocked how many don't use it and have some ugly fields. I know it's not big deal but does make big difference in the overall look of field, course if you have waterhemp all over little corn don't seem like big deal.
We have few B&R welding corn head parts, knife rolls, guide blocks, maybe others. Nothing but good to stay about them, i think after one year one of the blocks developed a crack i welded it up and ran fine all year. I put Calmer slow down kit, would love his choppers but i'm too cheap for that. Run a devastator really like job they do for almost 1/2 what calmer would cost but both would be sweet combo. But the B&R rolls do chop more then factory rolls, they pull harder to be aware push head much past 3-4mph i would be thinking of changing your cluster gear, no first hand experience there just what i've been told by 3-4 different guys with first hand experience. They all say worked great on 7720 but when i got 9500 i started popping cluster gear, which doesn't sound like fun in season job.
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Tips to get a 643 head to do better
