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If you plan on shooting far enough that BC becomes relevant, look at the 178 ELD-X. Very slippery bullet and I have data for that, too, also with Hunter.
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Have you found this to be the case? I just got it and have heard different results. Scott Satterlee claims that it changes POI but has no affect on group size which makes no sense to me. It has to open groups up.. It's a stick of plastic flapping back and forth which would cause wild inconsistencies in barrel harmonics.. At least I assume so. I'm obviously new and have already shot the thing at least once so what do I know?Do not use the Magnetospeed while shooting for groups. It will throw you off. Verify velocity then take it off when shooting for precision.
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Do you have any results regarding how it performs on game? I'm really sensitive to meat loss where avoidable and if what I've read is true and they behave like sst's, I'm not interested. I shot a buck with an sst a couple years ago and had bloodshot from stem to stearn. I'm trying to stick with monolithic and bonded bullets for hunting especially with this new 300prc I just picked up.If you plan on shooting far enough that BC becomes relevant, look at the 178 ELD-X. Very slippery bullet and I have data for that, too, also with Hunter.
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I use my magnetospeed in testing and about 50% of the time weekly matches.Have you found this to be the case? I just got it and have heard different results. Scott Satterlee claims that it changes POI but has no affect on group size which makes no sense to me. It has to open groups up.. It's a stick of plastic flapping back and forth which would cause wild inconsistencies in barrel harmonics.. At least I assume so. I'm obviously new and have already shot the thing at least once so what do I know?
Thanks, Tac. I certainly understand that it's unnecessary, it's just a hobby and why not play around with it? The post wasn't intended to try and get folks to help me shoot the smallest groups, I'm just asking about the velocity inconsistencies and what could cause a 50fps swing from one trip to the next. I'm fairly new to the game and wasn't sure if it was significant or not.1. Shoot FIVE-shot groups, not four. Why? Watch Youtube's blokeontherange to find out why four shots is NOT representative figure.
2. IMO you are trying too hard - we ALL want the best out of our rifles, and owe it to the prey that we shoot that it is the best and most humane that we can make. But you ARE shooting a hunting rifle, not an F-Class long-range target rifle or benchrester. Moreover, your bullets may not all be the same weight, in spite of what it reads on the box. Unless you are prepared to spend serious money on bullets by Berger or JLK, every brand of bullet will vary somewhat around their declared weight, even the much-vaunted Lapua stuff that I shoot for fun, not game.
3. Remember that your target for deer or elk is inside a six-inch circle, not a infinitesimal and unattainable dot.
THANK YOU! That's what I was worried about was a jump in velocity once I start pushing the bullets back into the case further.@Grimm
I agree that temperature differences could explain your velocities. Question: was there any differences in your cases between the first and second sessions; e.g., were you using new cases on the first outing?
FWIW, I do my seating depth testing first at a moderate charge, then work up the charge testing at my established seating depth. I might do some micro adjustments to seating depth after reaching the desired charge, but be cautious about increasing jump with a load that is near pressure, as increasing jump will increase pressure.
With regard to the brass, I do think that my first trip out it was brand new and this was the second time being fired.
Do not use the Magnetospeed while shooting for groups. It will throw you off. Verify velocity then take it off when shooting for precision.
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You're always going to get dampened results when shooting new cases. By that I mean the velocity you see at 56 gr with a new case will be achievable with only 55 gr in a fire-formed case.
I don't put much stock into results with new cases. Usually when I'm fire-forming new cases I simply use that time to run seating depth tests and scope adjustment tests (if a new scope). Any velocities you see with new cases will increase using the same charge in a fire-formed case, so back off at least a grain (maybe more) with formed cases and work back up.
Huh?
A fire-formed case is of LARGER volume than a factory new case. Greater case capacity with the same powder charge usually results in LOWER velocities. Just as seating a bullet shallower increases utilized volume in the case, lowering pressure (unless bullet is touching rifling), lowering velocity.
I certainly agree that a larger volume with the same charge, all things being equal, would result in lower velocity. But things aren't equal. There is much more work done on a new case as the pressure expands it to the chamber size. This work on the case saps energy for downrange velocity. Once fire-formed, firing the load does not expend as much energy blowing out the case and that power goes down the barrel.
But you need not accept this as an abstract idea. It's easy to test yourself, and every handloader should witness it with their own loads/cases. This is another reason why keeping good records of your velocities and observed pressure is important every time you shoot during load development.
Has not been my experience.