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  1. Doom

    300y ladder with 223/80.5 Berger/N540

    The problem with a Ladder shot at 300 yds is that it mixes the factors that affect the Point of impact. By that I mean the the path the bullet leaves the barrel and the velocity variation that is affecting the drop which also affects the POI. The environmental also begin to come into play...
  2. Doom

    OCW Help

    First off with the 223 the nodes when they show are only about +/-0.1 gn so the ).3 charge increment can skip it. Normally you should use 0.2 gn. The target displays what can be a common issue with OCW being shot round robin. It also test the shooters ability to duplicate the same shooting...
  3. Doom

    Does anyone else get frustrated reloading

    Oh yes, it is sometimes frustrating. But @diggler1833 has the right approach. If you read on the internet enough you will get the feeling that you have to "get to a kernel of Varget" or "seat to +/-0.0005" when in reality most of the time these types of thing just don't matter. Now lock rings...
  4. Doom

    CHRONOGRAPH USE AND BASIC SAFETY

    Obviously the velocity data can be important to determining a safe load but it doesn't replace the usual signs of excessive pressure. It is not critical to developing a good load either but it does make it easier to predict which loads will like work better at longer ranges. A load that shoots...
  5. Doom

    Right or left ?

    I found that using a pencil flame torch like the one below allowed for more precise heating and kept the heat away from the body. https://www.homedepot.com/p/Bernzomatic-Classic-Brass-Torch-for-Propane-Gas-Cylinder-UL2317/100079143
  6. Doom

    Sierra 6mm 107HPBT Matchking caution

    I think the older SMK you refer to was listed with a P/N of 1715. That bullet had a BC of .43 I think.
  7. Doom

    Right or left ?

    The ones on the left are likely the better cases since the annealing has moved below the body shoulder junction. This helps prevent the fatigue cracking in the body/shoulder junction.
  8. Doom

    .308 Winchester

    With a 20" barrel best groups should be around 2500-2550 fps with the 168 and 169 and probably about 2475 to 2520 fps with the 175 with target. I agree on the 2000MR comment and it was a crappy powder to shoot. Way too slow for the 20" barrel. I was in the 2650 range with it if I remember...
  9. Doom

    Sierra 6mm 107HPBT Matchking caution

    TO be clear on the "C", when the C is part of the part number as in 2200C it is a 250 or 500 round packaging. When it shows up as "Hollow Point Boat Tail - Closed Nose (HPBT-CN)" in the description the part numbers will be different if the size was the same as a different design. The first...
  10. Doom

    Barrel wear Vs velocity/weight/energy

    Within a given cartridge, in this case the 308 Win, the primary issue with barrel life will be how hot the barrel will be allowed to get as this is the primary cause of the material degradation in the throat. Since the amount of heat generation in a given firing is related to the mass of powder...
  11. Doom

    223 at 300 and 500

    About what my 700 Varmint (stock barrel) will do with 53 SMK. I tend to agree with @RegionRat that the 77 SMK is probably worth a try. Your ES can be responsible for about 1.2" vertical at 300yds so it may well be the issue here. N540 may be part of the issue. It's a double based powder and...
  12. Doom

    Low Recoil AR Load

    Thank you for your service. I am a few years behind you so I ended up not serving but certainly respect those who did.
  13. Doom

    Low Recoil AR Load

    @N_Turs, I wasn't familiar with the style of matches you were referring to but after looking them up they mirror some of our action shooting local matches. I am not sure exactly why you are so hung up on low recoil. It's one thing to look for low recoil due to physical impairment but if it's...
  14. Doom

    Quick Load

    You need to understand the difference between the two sources of data. The Hornady data is based on actual test firing of the specified components in an instrumented and especially designed barrel designed to indicate the maximum pressure that would be obtained in the smallest chamber meeting...
  15. Doom

    Deprime before or after tumbling? (Newbie)

    Corn cob media is not the most likeable tumbling media. Walnut media such as the Lizard bedding from Petsmart is much easier to use and does not typically plug flash holes. I personally deprime the cases before tumbling to keep as much primer residue out oof the tumbler as possible to limit the...
  16. Doom

    .308 win - reloading same brass for bolt action and an AR-10

    You absolutely can run the cases in two different rifles but it comes with a price. Since one of the chambers will require more sizing than the other you will be oversizing the case for the larger chamber. This means you'll be setting the shoulder back more than necessary for the tighter...
  17. Doom

    Reloading for shorter barrels?

    Didn't mean to start a fire storm with my comment. Shorter barrel accuracy may/can benefit from faster powders for the reason I stated but @spife7980 is correct that the powder still has to match the bullet mass and chamber/bore volume expansion rate to be suitable. There are other factors at...
  18. Doom

    Reloading for shorter barrels?

    Velocity is only a minor factor in stability until the SG starts to drop below 1.3. Then the impacts of ambient conditions and BC reduction become more significant. One thing to consider on accuracy is that slower powders take longer and more barrel length to burn out completely. Unburnt...
  19. Doom

    Need UPS for FX120i

    Zero drift is a function primarily associated with the temperature of the electronics in the scale/balance. It comes from two sources, the initial powering up of the electronics when the scale is turned on and changes in ambient temperature. It is important to remember that the drift is not...
  20. Doom

    Retesting some reloads today. Very odd results!

    @sig2009, if I interpret you correctly you shot multiple groups of 5 shots and got sd's ranging from 2-6 fps. If this is correct and your ES was essentially 2xSD then you were loading very consistent ammunition. That's true even if the loads were different. On the second loading if the same...
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