Kestak, when rc model says "open" he means the configuration of the copper jacket. A typical fmj has exposed lead at the base, because the copper jacket is 'open' at the bottom. Soft point has an opening at the nose, which is why you see the lead at the tip. Hollow point is obviously open at the nose.
All rifle bullets with their opening at the nose have the potential for being more accurate because the base is very smooth and uniform. Upon exiting the muzzle, the hot muzzle blast blows smoothly past the bullet without upsetting it. The fmj bullet (with it's open base and exposed lead core) does not have a smooth base, so the high velocity (supersonic!) muzzle blast shoves it around and destabilizes the bullet. In nearly every case, fmj isn't as stable and accurate as a good soft point or hollow point bullet. (Of course, any bullet can be made poorly. We're talking about good bullets.)
The lead tip of a .224" soft point bullet: It can be deformed, or even mangled. But it usually doesn't seem to be a source of inaccuracy. This one is hard to explain theoretically, but millions of shooters confirm the observation. The deformed lead point is close to the bullet centerline, as the bullet spins the deformed nose doesn't represent a sizeable angular imbalance, so it doesn't yaw or pitch. A deformity out on the large radius of the bullet would be bad, but close to centerline isn't so bad. None of us like the looks of a deformed soft point, but it usually shoots pretty well anyway.
The most accurate bullets are the ones made most perfectly. Regardless of bullet design, a precisely constructed bullet gives you the greatest potential for accuracy. That's why Sierra MatchKing, Hornady A-Max, Nosler Ballistic Tip, and other premium bullets are more expensive than ordinary fmj or soft point bullets. It takes more time and skill to make a bullet as nearly perfect as can be achieved in a mass manufacturing environment.
The most perfect bullets: Look at the ones that are machined individually out of a solid bar of brass. You buy those directly from the machine companies who make them for long range match shooters. They aren't found on clearance sales at cheaper-than-dirt and MidwayUSA.