Some powders ‘cheat’ ,producing and immpresion of security with a certain flat line band. Vihtavouri N140 is 1 these types of powder its dead secure in eighteen-23°C temperature variety ,which addresses temps Considerably with the calendar year in central Europe .
Extremely attention-grabbing. I’m not a benchrest dude, so it’s good to really know what those guys are accomplishing. That seems to suit what I’ve read, way too. It’s a fascinating very little Activity! You will find probably a great deal of classes we could study from that side of your precision rifle world.
Wow. Thanks a great deal for sharing some data on the opposite powders. That basically assists set these results in context in the larger photo. And that’s exciting with regards to the N140. I suppose that corroborates what I discovered linked to the modify in muzzle velocity not remaining linear with temperature transform. I agree that you simply shouldn’t just just take the standard.
So I chose to examination 4 distinct powders which are perfect for the majority of calibers Utilized in very long-assortment, PRS-model matches:
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I was in a very hurry, so I didn’t shell out time troubleshooting them. I do think there was some interference, And that i’m positive I could figure it out if I spent enough time on it. I even have 2 close friends with them now, so I could most likely have 3 arrange side-by-facet, and when they all gave the identical correct reading through for every shot … it looks as if that might offer you a lots of confidence while in the output. The last word experiment will be to shoot 3 of them like that, and also shoot about a 12 foot Oehler or one of the business-grade chronographs like Bryan has. I’d wager he does that experiment at some point, and I am able to’t wait around to go through the results.
Benchresters do load on the array and match but with reference to powder fees the aren't awfully appropriate ,most use volumetirc Harrells BR powder evaluate i will be suprised should they charge better than +- 0.
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That is an excellent stage, Martin! I hadn’t considered that, but you’re Totally ideal. There is certainly some price into a powder Have got a predictable, linear change in muzzle velocity.
To stay away from that situation, when employing a temperature sensitive powder the smart website selection is to load down so that you’ll keep on being within the number of Risk-free pressures even when the temperature rises. But if you do that, it possible removes any muzzle velocity gain These powders could have delivered around those that are particularly formulated to become temperature secure.
I don’t Assume staying off by one-two levels would have any measurable influence on hit probability, nonetheless it’s more of the 25+ diploma variations that could result in a miss. The lesson here is to simply not believe the muzzle velocity you shot sixty degrees are going to be similar for ninety levels. It just doesn’t get the job done that way. But regretably, most people don’t realize that and most ballistic calculators don’t enable you to account for this sort of variable.
For a practical matter do you often shoot at temperatures diverse from temperature at which you zeroed the scope? And is the temperature of the ammunition distinct from that of the rifle and scope?
Truthfully, you positive may be ideal concerning the MagnetoSpeed currently being additional exact. It’s blind religion In any event, mainly because I am able to’t definitely think of A cost-effective solution to determine it out. If I'd usage of an entire-blown, Expert doppler set up Or possibly a commerical Oehler device like what Sierra or someone uses, you could potentially most likely figure it out.
I did see my BC improve a bit by pointing. So if you’re looking for every single past benefit you may get, pointing might be well worth your time and effort! But I didn’t do this in these checks. I seated the Berger 140gr Hybrid bullets employing a Whidden Gunworks Bullet Seating Die, which have proven to supply very dependable and repeatable seating depth.