berger 200 20X
- Thread starter mattt
- Start date
XTR
F-TR obssessed shooting junkie
About the same as the 200 Hybrid. The bearing surface is a little shorter but not enough to make too much difference from what little I've been able to test.
The sweet spot that a lot of shooters have reported with the 200H is about 2650. I tested a load with the 200-20 and hit a wide node, smack in the middle its at 2659 average on my 30" barrel. Go figure. Not too different. I think maybe the 200-20 shoots the same nodes, just with a little less pressure to get there, but not enough less to try to run 100FPS faster.
You can probably get a little more, but running the numbers in JBM, even if you get to like 2730 or so, you gain a whopping one bullet diameter of drift on a 1MPH full value wind. So figure out where it shoot lights out tight and shoot it there. Find a node that shoots and don't chase velocity. Take it from someone who has been down that road. A stable load that shoots tight will agg higher in the end. I'm not saying that if you get a wide node running higher don't shoot it, but the guys that win in this game are rarely on the edge. They have something that works and works well and doesn't get squirrely if the conditions change, and they aren't smoking brass at every match either.
The sweet spot that a lot of shooters have reported with the 200H is about 2650. I tested a load with the 200-20 and hit a wide node, smack in the middle its at 2659 average on my 30" barrel. Go figure. Not too different. I think maybe the 200-20 shoots the same nodes, just with a little less pressure to get there, but not enough less to try to run 100FPS faster.
You can probably get a little more, but running the numbers in JBM, even if you get to like 2730 or so, you gain a whopping one bullet diameter of drift on a 1MPH full value wind. So figure out where it shoot lights out tight and shoot it there. Find a node that shoots and don't chase velocity. Take it from someone who has been down that road. A stable load that shoots tight will agg higher in the end. I'm not saying that if you get a wide node running higher don't shoot it, but the guys that win in this game are rarely on the edge. They have something that works and works well and doesn't get squirrely if the conditions change, and they aren't smoking brass at every match either.
XTR
F-TR obssessed shooting junkie
Based on my experience, if you have a .170FB rifle set up for the 185 you have a perfect chamber for the 200-20. My barrels that shoot 200s are throated out to between 205 to 210 for the 200Hybrids. That puts pretty close to the same amount of bullet in the neck with a 200H as you have with the 185 at a .170FB. The 200-20x seats in the neighborhood of .030 further out on your seater stem than the 200H (I need to measure that, but it's close) to get the same ogive to lands relationship as the 200H. The bullet is moved well up in the neck on my cases. I'm going to guess that it seated in a .170FB ~.010 to .015 off of the lands you are going to have about the same bearing surface in the neck as a 185 does in that chamber. Pretty sweet.
Something else I have seen.
It looks to me like Berger put the nose off of a 215 on the 200.20X. In my setup, with my Wilson seating dies, the 200.20x and the 215H seat effectively exactly the same (within .003) BTO with out changing the settings on the die.
If you seat a 200 and a 215 in empty cases you can't tell the difference with out weighting them.
Just another data point.
Something else I have seen.
It looks to me like Berger put the nose off of a 215 on the 200.20X. In my setup, with my Wilson seating dies, the 200.20x and the 215H seat effectively exactly the same (within .003) BTO with out changing the settings on the die.
If you seat a 200 and a 215 in empty cases you can't tell the difference with out weighting them.
Just another data point.
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