Which is better 6.8 or 6.5

However, the initial load offered to the public fired a grain bullet at 2, feet per second 1, foot pounds of energy. Just like with the 6. In fact, that lethality advantage the 6. Unfortunately, as was the case with many of the other cartridges Remington has designed over the years like the 6mm Remington,.

In this case, initial 6. Remington fixed those issues and shooters now have access to a 6. However, this did not happen until after SAAMI approved the cartridge using the older specifications. On the other hand, 6. So, while the 6. As you can see in the photo below, the 6. First, the two cartridges have the same overall length: 2. The AR can only accommodate cartridges up to 2. For these reasons, case capacity for the two cartridges is similar, but the 6. Each cartridge also uses different diameter bullets:.

Most 6. Those differences in the external dimensions of the 6. This is illustrated in the table below comparing Hornady factory ammunition. Note that Hornady advertises a velocity of 2,fps for this particular 6. At the same time, they advertise a velocity of 2,fps for their 6.

As you can see, the 6. This is due to the fact that this particular load uses a heavier bullet with a higher ballistic coefficient and a faster muzzle velocity. Additionally, that particular 6. In that case, the 6. At yards, the 6.

All that being said, the gap in performance between the cartridges is pretty minimal at ranges inside yards. The chart below compares how much a 10 mile per hour crosswind impacts those same 6. Once again we see that the 6. This holds true for both barrel lengths, though the gap in performance is smaller when the 6.

The table below compares the recoil produced by very similar loads to the ones compared above for each cartridge when fired from identical rifles. Felt recoil will vary from shooter to shooter and rifle to rifle, but free recoil energy is still a useful way to compare cartridges. As you can see, both cartridges have very mild recoil, but the 6. Specifically, the 6. Trajectories and retained kinetic energy are similar at typical hunting ranges when both cartridges are fired from the same length barrel.

This is especially remarkable considering that the cartridge packs that level of performance into a very small package that can still fit in the relatively tight constraints of the AR platform. Though it does have more recoil than the 6. Additionally, the 6. Since it utilizes. While the 6.

Remember: the situation changes quite a bit when comparing the performance of those cartridges from rifles with the same barrel length. However, while the 6. Specifically, the larger diameter. All other things being equal, a bigger bullet will make a bigger hole, cause more tissue damage, and result in more blood loss. Glenn and Michelle Guess who have taken literally thousands of hogs really like using the 6. Watch the video below to see just how effective the cartridge is on a couple of really big, tough boars.

In addition to hunting, the 6. On one hand, the 6. I am a firm believer in sighting-in hunting rifles and loads for maximum point blank range MPBR. Winchester touts the. Among the cartridges compared, only the 6.

Trajectory matters, because the flatter a bullet flies the easier it is to hit a target down range. Bullet placement is the most important factor in achieving quick, humane kills, so anything that makes hitting easier is desirable.

Trajectories are rounded to one decimal place; yardage is noted in parentheses. Results are in descending order of MPBR yardage. These data further document what the MPBR data indicate: the 6.

This is typical of medium velocity cartridges in general. Sectional density SD is the ratio of a bullet's weight in pounds to the square of its diameter in inches. SD affects penetration, as all other factors being equal bullet construction, for example the bullet with the highest sectional density will penetrate deepest. Obviously, to kill cleanly, any hunting bullet must penetrate into the animal's vitals, so hunting bullet SD is important.

For Class 2 game, a SD of. Here are the SD numbers for our comparison bullets, in descending order. A longer, smaller diameter projectile penetrates better than a shorter, fatter projectile of the same weight and construction, which only makes sense. The abiding problem with medium and large bore bullets is that they must be quite heavy to have high sectional densities. This is why the.

The grain. This may not be a great concern on deer and similar sized thin skinned game that do not require a lot of penetration if only broadside lung shots are taken, because these large diameter bullets are going to deliver a lot of shock energy to the target, even if they do not always penetrate well. The killing power analysis, below, sheds more light on this. Killing power is the most difficult factor to estimate, as there is no definitive scientific formula to apply. Various systems have been created to estimate the killing power of rifle cartridges, with varying results in terms of accuracy.

Unfortunately, many such systems have no correlation with reality at all. Not only is it generally consistent with results in the field, it can be used to compare any load at any range and includes the factors of energy at impact which includes velocity , SD and cross-sectional area in an easy to use formula to arrive at a Killing Power Score KPS for a given load at a given distance, via the formula:.

Cross-section areas of relevant bullet diameters are. Note that this is a comparative system. We estimate that a rifle cartridge should generate a KPS of at least I calculated the killing power of these loads at yards, as most whitetail deer, blacktail deer and feral hogs are killed at yards, or less. KPS values at the five yard increment closest to each load MPBR are included, to document the power of the loads near the longest range at which a responsible hunter should use them.

Loads are listed in descending order of yard KPS values. If I had to choose one of these loads as an all purpose tool for hunting common Class 2 game, it would be the 6. If I wanted the most powerful cartridge of the lot, I would choose the grain.

I believe this load will prove to be the most effective of the initial Legend hunting loads, mainly because it has the highest bullet sectional density.

He began reviewing firearms for publications in the mid s and have been fortunate to make many friends in the industry. He has improved continuously his firearms skills and knowledge, which is a never ending journey. TL;DR: 6. Very light recoil. Better bullet selection. Designed for short barrels. More affordable ammo. Slightly larger diameter bullet. Designed for longer barrels. Ideal for hunting small to medium-sized game. Longer practical effective range. Bullets with a lesser sectional density.

Not for precision long-range shooting. Smaller bullets weight assortment. Advantages diminish with shorter barrels. Best For. Self-defense and hunting at close to medium range.

Competition and small game shooting. When Did the 6. Relevant Characteristics Between 6. Barrel Matching. In less than inch barreled firearms.

Bullet Selection. Bullet Diameter. Initial Velocity. Effective Range. Effective from to yard. Maximum average pressure MAP. Similarities and Differences Along with. Barrel Matching From the start, the new 6.

The Grendel is simply tailored for the designated marksman, a Soviet concept widely used by the U.