![]() ![]() So, what about accuracy? As expected, the Sako’s groups were smaller than the Browning’s, but look how the group sizes shrink with the heavier and semi auto-friendly ammunition. ![]() The better functioning and reliability is not only velocity-related, as the necessary bullet coating can also affect the reliable functionality. Through the Browning, the Subs shot 1011 fps/89 ft/lbs with three malfunctions in 50-rounds, the Max ammo shot 1041 fps/102 ft/lbs with no problems. ![]() Lastly, the Winchester 40-grain Subs and 42-grain Max shot 1012 fps/91 ft/lbs and 1054 fps/104 ft/lbs respectively in the Sako. Which was 100 reliable for 50-rounds in the Browning perfect! The Subs in the Browning did not function at all well, thus the Semi Auto version, the Subs shot 934 fps/78 ft/lbs and 1081 fps/107 ft/lbs for the Semi Auto. The Sako gave 968 fps/83 ft/lbs and all rounds were very subsonic. Thus, the higher velocity on the Contact initially allows it to function the Browning better despite a small velocity loss. The lower velocity is because the action uses an inertia bolt that takes a small amount of the energy from the fired round to cycle the action. The Browning gave 1007 fps/90 ft/lbs for the Eley Subs and 1073 fps/105 ft/lbs for the Contacts. However, the Contacts velocity rose to 1087 fps for 108 ft/lbs and in the 10° temperatures, so a couple of those shots made a supersonic crack. In the Sako, the Subs were consistent at 1021 fps and 93 ft/lbs with all shots were subsonic. As it happens, I also shot the ‘semi’ through a Ruger 10/22 and Remington Speedmaster too, to test reliability.įirst up, were the Eley Subs and Contact. The Browning is accurate too but can be fussy so, a good test to see if the semi ammo was better in terms accuracy and reliability. I used a Sako Finnfire bolt-action and a Browning SA semi-auto for the accuracy tests, The Sako is very accurate and would show any differences between ammo types. It produces better expansion compared to other rimfires so, terminal performance is enhanced even at sub-sonic velocities and functions better in semiautomatic rifles too. The newer 42-grain Max features a Power-Point truncated nose hollow point bullet. It has a long truncated profile and wax lubrication with good accuracy. This is the mainstay of vermin shooters with a deep 40-grain hollow point, designed to expand quickly and penetrate less to deliver the energy on target. Specifically designed for semi auto rifles for reliability and consistent performance, it uses a heavier 42-grain bullet and higher velocity that sits on the sound barrier threshold and is lightly wax-coated for a reliable feeding and function. This 40-grain load has a deep hollow point bullet design for fast expansion and energy transfer and a heavy wax coating, which, combined to the slower velocity, makes it not suitable for semi-autos. The bullet is heaver, at 42 grains, for a higher energy transfer and lubed with paraffin wax to avoid build up in the mechanism and magazines. Although intended for competition shooting, as it’s a round nose, but it still has applications for reliability in sporting rifles. The Contact as a subsonic specifically to work better in semi autos for more reliability. The bullet is lubricated with a non- greasy lube to help in a smooth function in your rifle. This is a hollow point load and designed to have a shorter penetration and better bullet expansion to deliver a good stopping power compared to standard velocity. Today, manufactures make subs for semi-autos, so I thought a comparison between them and the standard fodder would be useful. If you shoot them in a semi-automatic, you can get reliability problems. ![]() 22 rimfire has been the mainstay for vermin control and today the top choice seems to be the sub-sonic (subs) version, primarily designed for use in a moderated bolt action rifle. ![]()
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