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  1. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Ill edit my picture to remove confusion.
  2. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    .315 freebore. Im not single feeding.
  3. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Im a inch off on those numbers. Subtract a inch and thats the measurement using my hornady guage. Didn't even catch that when I wrote them down.
  4. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Seating depth test with the sierra 197s at 2427fps. 10 shot group was a confirm group for the 1.980 depth. Good enough for me!!!
  5. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    I Been thinking about it and my only hesitation is that its a little short, I would love it if somebody would confirm this but it appears like peterson 7 br case is 1.520. Lapua 6 br is 1.555. I really want to get as much neck as possible for this long bullet, my reamer is 1.555. Maybe they...
  6. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Ya I certainly have, wish they were cheaper, my curiosity may get the best of me tho sometime. I wasn't able to get the 95 Seneca to shoot very good out of my 6 dasher so thats also causing some hesitation.
  7. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    I think hornady app has a a few issues with the group analysis. 6 inches at 1000 isn't .05 mil it should be about .16 - .17 mil
  8. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    As close as I can tell with my specs im under max preasure still at 64193, this is gotten by trueing ql up with the ba. Maybe you dont view the dasher max at 65000, I am also using fireformed lapua brass that has about .5-.75 gr more h2o capacity then alpha or peterson. That being said, I use ql...
  9. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    All good stuff and thoughts guys, I have gotten to the point that I dont ever trust box bc values but generally they are closer then im experiencing with this project. So that would point me towards something going on with the lower velocity. I was under the impression that hornady 4dof and ab...
  10. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Took it out to distance today, and it shot great. Im curious if anybody else has experience with 190 atips? Looks like hornady is either overstating bc values on them or my bc is being compromised, could easily be a bit of both. G1 published .836 trued .745 G7 published .422 trued .376 Maybe...
  11. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    I think that would be a great option. Im just using from my stockpile of used 6 dasher brass or what i had on hand from other rifles at the moment. I will probably buy new brass in the future specifically for the rifle. I will certainly consider that option.
  12. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Here is an update, got my new seating die in and it helped a lot, still had issues with concentricity tho. I opted to turn the necks and ended up having to take .0035 off of my overall loaded neck diameter to get material removed from around the whole neck. I guess the necking up really caused...
  13. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    400-600 yards 2 mil is good. Thats what the movers range fall at the ranges I shoot at.
  14. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Well guys I have few speed bumps. Looks like i may have to swap out some internals in my seating die to get this thing dialed in. Was have issues with bad one shot flyers, and trying to figure out what was going on I measured the concentricity and it was way out of satisfactory spec. Ill Have to...
  15. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    A 3 mph mover, like is typical at any prs match.
  16. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Im not gonna dive into the weeds of a debate on this thread. Pm me if you want to debate. I will tell you my thought process behind this build. 1. Fun!!!! 2. Long flight time for more recover time at shorter ranges, I blink under recoil, it sucks!! I have tried to train myself out of it but my...
  17. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Cfe 223 36 Rl 15 34 H4895 33.3 Rl15.5 34 Varget 33.8 Currently considering these as max from the preasure testing ive done. Lapua brass BTW.
  18. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Good idea!! Ill have to see if i can find some. Found a place locally with some h4895 I'll be able to try that also.
  19. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Sorry im not organized, I should have clarified the build earlier, so here it is. Impact 737r Foundation Samson Crb comp 8 twist Botnia maxi Nf atacr 7-35 Bix'n and tacsport pro x, gator shoe Warne precision mount Sg pulse level
  20. Cz455guru

    Follow my 7 dumbo project aka 7 dasher!!

    Cfe223 190 Atips at pressure.
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