![]() For this application, length is not super-critical. Here’s that data:Īgain we saw more length variation compared to what would be expected for 30 caliber match bullets, but this was also expected based on how these plated bullets are formed/manufactured. Again I used a micrometer accurate to 0.0001″ recording the length for each of the sample bullets. The length consistency measurements were a bit more straightforward. These results are VERY good: These plated bullets showed pretty much the same diameter consistency as premium jacketed bullets! Length Consistency Second diameter measurement (bullet spun 90° from initial measurement).For close-quarters 300 Blackout ammunition, this variation is well within acceptable criteria! Diameter Consistencyįor diameter consistency, I performed two checks for each bullet using a micrometer accurate to 0.0001″: I would expect this outcome based on how electroplating works (in comparison to jacketed bullet manufacturing). You’ll notice there’s a bit more weight variation for these bullets compared to some of the jacketed bullets I’ve tested. The weight values were recorded as follows: Weight ConsistencyĮach bullet was placed on an A&D FX-120i lab scale which is accurate to 0.02 grains. For the following test scenarios, 20 bullets were pulled from a brand new box of Berry’s 220 grain 300 Blackout bullets, and put through a sequence of tests. ![]() Lab Testsīy testing bullets for variation in weight, diameter, and length it’s possible to objectively compare one make/model bullet to another. It would also be interesting to look at supersonic loads with these bullets, but I’d likely opt for a lighter bullet for 300 Blackout loads in that category. Shooting groups with a bolt-action 300 Blackout rifle.A different scope or higher power scope (reticle on the Strike Eagle not best for groups).I’m pretty confident that I could get the groups even tighter if I experimented with the following: One of the groups came in at exactly 0.900″: The AR Diamond trigger helps a LOT with concentration when shooting groups for accuracy like this! Groups averaged about 1″ at this distance which is plenty good for the kind of work I’ll be doing with these loads. I didn’t have a bipod mount on my upper, so I shot off some sand bags at maximum magnification: 6 power. Accuracy Testingįor accuracy testing, I decided to shoot some 5-shot groups at 50 yards, the maximum distance I’ll plan to shoot at for this ammunition scenario. That should bring the velocity to about 1040-1050 fps, which would be perfect. These are some great results! I’m thinking I’ll try 9.5 grains of H-110 as a compromise between energy retention and “supersonic buffer”. I chronographed two loads (see load data above), one with a 9.0 grain H-110 powder charge, and one with a 10.0 grain H-110 powder charge. The loaded ammunition looked as good as it shot:įor the chronograph data, I used the Caldwell G2 optical chronograph and the Caldwell companion app on my iPhone (see the f ull review I did on this system HERE). I’ll do some experimenting to figure out how to best solve that problem! This caused some issues with cartridges tipping forward or back of the press (no going into the completed cartridge bin). As mentioned in the video, the only real challenge loading with this setup is the strange balance (center of gravity) for these “top heavy” cartridges. This ammunition was loaded on the Hornady Lock-N-Load AP 5-station progressive reloading press:Ī nice addition here would be a powder check die like Hornady’s Powder Cop, or the RCBS Lock-Out die. Always cross-reference load data with manufacturer’s published data.Īs mentioned in the video, if you’re looking for once-fired 300 Blackout brass, you can find it at Capital Cartridge (use “ULTIMATE” code to save 10%!). ![]() Ultimate Reloader is not responsible for errors in load data on this website.
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