No. Spring pressure has little or nothing to do with where the bullet nose makes first contact. The variation is simply due to the amount of support given the front of the top round in the magazine when the slide starts forward after firing. Try this: take two magazines of the same type and fill one to its maximum and just put one round in the other. Place them side-by-side and examine them from the front. You should see something like this:
P(08)C040007c Barrel Ramp Design, Post 36.jpg
It's that gap under the top round in a full or nearly full magazine that allows its nose end to rotate down (to close the gap) when struck by the advancing slide. It's all due to the angle of the magazine well and there's absolutely nothing that can be done to eliminate that gap (and nose diving). As the magazine empties, the gap gets smaller and smaller and by the time there are, 3 or 4 rounds left in the magazine the gap is gone and nosediving diminishes.
But Les Baer makes good stuff and you shouldn't have jams with a 5" Premier II unless it's due to the reloads and/or magazines.
• Perform the test mentioned at the bottom of Post #6.
• Try a standard Colt or Checkmate 7 round magazine.
If you intend on getting into NRA Conventional (Bullseye) shooting you only load 5 rounds at a time anyway. And your Magnus #801 looks like a clone of the H&G 130 SWC. It's essentially the same ogive as all the commercial SWCs I've ever seen and shot (Remington, Western, Federal, my home-cast SAECO 130s) and Petunia (my wadcutter gun) gobbles 'em up like M&Ms!
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